Gentex Mirror Wiring Diagram

I've got the same mirror, too.  I need to know this aswell.  I got mine out of a 97 explorer and I am putting it in a 94 dakota.  I have same model mirror with bottom switch.  Please help me, aswell.

There are 6 pin slots, 5 are in use.  It is numbered 1-6 as followed

1-RED / yellow

2-GREEN/ YELLOW

3-black

4-BLACK/ pink

5-WHITE/ violet

6-open slot

Thats it, please let me know what this are for!!

Thanx

Chad

Here is the low down on the connections to a Gentex mirror (with comp and temp) cut from a late model GM product. The connector pin numbers are found on the wire incursion side of the mating connector.

                              GM wire harness color                  function

PIN 1                  PINK                                                 POWER +12 volts

PIN 2                   BK                                                    CHASSIS, GND

PIN 3                   LT GRN                                           BACKUP LIGHTS

PIN 4                   GY                                  TO AUTO DIM OUTSIDE MIRROR

PIN 5                    PINK                              TO AUTO DIM OUTSIDE MIRROR

PIN 6                    DR GRN/WT                                  TEMP PROBE

PIN 7                    BK/WT                                             TEMP PROBE

Note: Pin 3 is to be connected to the backup lights to turn off the auto dim feature in reverse. If you intend not to use this feature connect the LT GRN wire to chassis ground. If this pin is floating the auto dim will not work properly. Hope this helps.                             Walt

I have two Gentex mirrors and I can not get either to work. I have hooked up the wires as above and still do not get the LED light to come on nor the display.  Is there a trick or something to activate it?  Any suggestions to get these mirrors working would be greatly appreciated.

Thanks very Much,

Lonny

I have a 16 pins mirror, wondering if any1 here knows what the each pins are use for?

Got both of my mirrors to work. Spoke with the good folks over at Mito Corp.  Their tech guy said that it would be pretty difficult for the mirror to burn out and that likely it was just a bad ground.  Carefully rechecking my connections, I found that to be the case and now both mirrors work perfectly.  The wiring matches the schematic that waltsckts provided above.

Thanks guys for all your help!!

Lon

dragonboi wrote:

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I have a 16 pins mirror, wondering if any1 here knows what the each pins are use for?

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I also have a 16-pin connector with 13 wires attached. I have opened the mirror and only managed to light up some LEDs to varying degrees while probing around with a continuity meter.

I received this earlier today.

1 -
2* - Bare - Microphone
3
4
5
6 - Brown - Air Temp Sensor
7 - GREEN/ Black - Air Temp Sensor
8 - Black - Ground
9* - Light Green - Reverse Dim Inhibit
10* - Gray - Microphone
11* - Dark GREEN / WHITE - Keypad Signal
12* - Light Green - +5v Keypad Voltage
13 - Yellow - 12v+ when Key is on
14* - Yellow/Black - Green LED Signal
15* - BROWN / White - Red LED signal
16 -

The ones marked with a * indicate optional connections.

My Gentex has the OnStar interface (3 buttons on the bottom, 1 power button). On my Gentex, pins #1, #6 and #7 are not wired up, so I guess this unit doesn't have a standard temperature feed, only the compass unit.

As I don't readily have a 12V supply around I tried to use my continuity tester as a feed, but that's only 9V so I haven't managed to fire this mirror up yet. Could you hook up pin #8 and #13 and see if your's works correctly?

I'm going to make up  a 12v collection of cells quickly to see what I can figure. I hope I haven't popped anything while probing around inside the unit with the continuity tester.

I am not sure about pin #16 as mine has a wire, but the list above shows nothing connected.

If anyone can fill in what #3-#5 and #16 are for I'd really appreciate it.

gdoug, I have the same Miror.
Here is the info I found on the reverse triggered wire.

12-VOLT (POSITIVE) REVERSE LAMP CONNECTION (OPTIONAL)

8.1 Route the white wire to a reverse triggered wire.
8.2 Using a multimeter, check for a wire at fuse block or in driver's step well area that tests for positive when shifting the vehicle into reverse.
8.3 Using a butt connector, scotch lock or t-tap connector, connect the wire to the reverse circuit wire at this time.

NOTE: The use of this optional wire is at your discretion. When vehicle is in reverse, it un-dims the mirror for better visibility.

The complete document can be found in https://www.mitocorp.com/mirror_installation.htm

On a side note. If any one know where I can find info on Ford Mustang 2001wiring diagram be much appriciated.

Thanks,

fifo207

hey fifo207,

I don't know if he would be any help or not, but there is a guy that has a website about his Ford Crown Victoria P71 Interceptor. He seems to be a Ford Fan in general. I don't know if he can help you with your wiring diagram, but he might know where to find one. His site helped me the most, trying to wire up my mirror also.

https://www.p71interceptor.com/

https://www.p71interceptor.com/gentexmirror/

He has a link to his email address.

Hope this helps...

Thanks gdoug,

Found most of what I needed in the car user manual (go figure ;)

Got it installed and working nice this weekend.

I also just bought a Gentex auto-dimming ONSTAR mirror from eBay which has the 16-pin connector, compass, but no TEMP display.  I received a wiring diagram which matches an earlier posting, and it says pin 5 is IEC-OEC+ and pin 16 is OEC- with no further discussion of what these 2 things mean.  I wonder if this is to make the outside mirror(s) dim along with the rearview mirror?  My 2000 Seville STS has the autodimming mirror setup (including driver's door outside mirror) but no ONSTAR buttons.  I still would like the driver's mirror to dim along with the new Gentex mirror.  Does anyone know for sure about pins 5 & 16?  It also mentions that pins 3 and 4 are for Air Bag On (pin 3) and Off (pin 4).  I'm not sure how airbags relate to the function of the mirror (unless it could be for trucks which could have the passenger airbag turned off with a key)????????   All other pin layouts from the above note match my diagram.  Thanks for any advise... Doug

I have a Gntx-261 that has the comp/temp/air bag notification/auto dimming, and have been trying to get a harness for this mirror.  Are all the pins on the mirrors the same?  Can any 16 pin gentex mirror harness be used on the mirror? 

The mirror I got is supposed to be for a 03 GMC truck (it has the air bag off notification on the lower mirror)  If I can use any harness, I can just buy one from GM for my 03 trailblazer or an 02 trailblazer that will work and have the right length of wiring.

Thanks for the help in advance

I just purchased a GNTX 177 on ebay. Can someone confirm if this has the comp and temp feature on this model? The seller claims it does but i already have this mirror in my '99 GMC Sierra with only the compass. Can i just add the temp sensor to this mirror and it work or did i get misled.

Thanks in advance

From what I have learned about Gentex Mirrors the Mirrors that have Temperature display have the following buttons on the front : "Compass" and "Temperature" or (Comp and Temp). Also the compass and temperature displays show together (compass on top and temperature on bottom)

The mirrors that have Compass only have these buttons "Compass" and "Mirror" or (Comp and mirror). The mirror I bought out of a wrecked 99 Suburban  (old body style) has compass only. It takes up the full display.

Hope this helps............

Thanks for the reply gdoug, i think you are correct on the comp/mirror buttons thats what had me wondering why the seller said it had temp.

I have seen earlier models that you had to switch the display to show comp or temp thats why i thought he was accurate..

The other thing that has me wondering is it has a 7 prong plug and on the circuit board  in the mirror it has 7 prongs also.

Mine has 7 pins also, I believe some of the other wires are output to side mirrors that dim. The 3 that I have identified on mine are +12V, Ground, and Reverse signal input. This disables the dim function on the mirror when in reverse.

You are correct on the older models that switch from compass to temperature. I did some more searching around also. When mine powers up, all the LED's light up and it does show the celisus and farenheight symbols, but that function is not available in my mirror.

I had much better luck searching the salvage yards. I got mine for only $25. If you are shopping on Ebay, and find one that has temperature, make sure you get the correct temp probe for it. Most of these people are selling the mirror without the temp probe.

Good luck!

The guy i bought it from took it back with no trouble. Evidently he didn't realize they all don't have temp.  The info he got from the dealer was the mirror button worked the temp and the compass for just that on older models, that may be the case with yours?

I got another last night, this time it has the comp and temp button.

I got the temp probe and connector plug from GM; Here are the part numbers if anyone needs them;

Temp Sensor= 15047946

Sensor plug(with 2 wires about 12" long attached)= 12101856

You can get them at   gmpartsdirect website

does anyone know what is wrong when the compass shows a NW reading when it was installed instead of having me calibrate it? It just stays on NW and doesn't move no matter where i go????

please help!

Ciro

Dav96] wrote:

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oes anyone know about the Gentex 177  auto dimming mirror?   I got it out of a wrecked 2001 GMC Truck it has the compass and temp with a 7 pin connector with a black wire running from inside the mirror down to a box on the mount.  I would also like to know if this mirror needs a temp probe because it has some kind of box on it where it mounts up on the windsheild I opened up the box and inside the black wire there were 5 small wires  White, Yellow, Black, Orange, and Green connected to a small circuit board with two small  metal boxes on it could this be the temp sensor?

---

anyone know about the Gentex 177. I want to inst it on a 2000GMC Sierra. The wire are black,green,grey,yellow and pink with a black stripe.Need help with where these wires hook up 

Dav96] wrote:

---

oes anyone know about the Gentex 177  auto dimming mirror?   I got it out of a wrecked 2001 GMC Truck it has the compass and temp with a 7 pin connector with a black wire running from inside the mirror down to a box on the mount.  I would also like to know if this mirror needs a temp probe because it has some kind of box on it where it mounts up on the windsheild I opened up the box and inside the black wire there were 5 small wires  White, Yellow, Black, Orange, and Green connected to a small circuit board with two small  metal boxes on it could this be the temp sensor?

---

I have a Gentex GNTX-115 model mirror. its got maplights and auto-dimming feature only. its got a 7 pin connector in the back with a harness. Only 5 of the pins are in use so I have 5 wires, the colors are as follows:

Black

Pink

Orange

Light Greeen

Blue/white

I assume black is ground. need to know which ones are

1. constant power

2. on with ignition

3. on when doors are open

4. i guess one is for reverse light hookup

thanks

Paul

I bought a Gentex 126 from a 1995 Cadillac Deville Concours, 4 door sedan that did not have a wiring harness.

It has two plugs on the back,
1. Center bottom with 3 prongs. the left one has an H and a 1, the far right plug in numbered 3, doesn't seem to have anything on the center prong.

2. Almost center of mounting bracket with 2 prongs, numbered 1 (left) 2
(right)

Both sets of prongs has JST or J8T on them

All I need is the wiring for the mirror to work, no other features are needed, even though I do not believe it has any other features.

jybwatson wrote:

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I bought a Gentex 126 from a 1995 Cadillac Deville Concours, 4 door sedan that did not have a wiring harness.

It has two plugs on the back,
1. Center bottom with 3 prongs. the left one has an H and a 1, the far right plug in numbered 3, doesn't seem to have anything on the center prong.

2. Almost center of mounting bracket with 2 prongs, numbered 1 (left) 2
(right)

Both sets of prongs has JST or J8T on them

All I need is the wiring for the mirror to work, no other features are needed, even though I do not believe it has any other features.

I am wanting to install this in a 1997 Pontiac Grand Prix

---

I also have a Gentex 26 16 pin Onstar mirror from eBay, but no diagram. Here's the pinout data I got from a really helpful GM employee on the Grassroots Motorsports BBS:

Pins 1-4 are not used
5 is an auto day/night signal, which comes from the LH outside rearview
mirror
6-7 are not used (on my mirror, but are the temp probe connection on others)
8 is ground
9 is supply voltage from back-up supply (I guess so Onstar will still work in the event that the vehicle battery is disabled in an accident)
10 is not used
11 is keypad signal (out) for On-star (pressing any button puts out a 5v multiplxed signal on this pin, - so you can't just use the buttons to control whatever you want to, sorry) 
12 is keypad supply (5v) voltage (in) for the buttons
13 is ignition voltage (12v -main power IN to the mirror)
14 keypad green LED signal
15 Keypad red LED signal
16 is the return line to the LH outside mirror for day/night signal

[

 After reading all the other posts in this thread and comparing the wiring data, here's a more complete list: 

Pin 1-not used

2 - Microphone (if the mirror is equipped with it)

3 - "Passenger Air Bag on" notification (if mirror is equipped with that display)

4. - "Passenger Air Bag off" notification (if mirror is equipped with that display)

5 - auto day/night signal, which comes from the LH outside rearview mirror

6 - Temp probe connection ( if mirror is equipped with display)

7 - Temp probe connection (if mirror is equipped with display)

8 -  Ground

9 -  one source says it's a Reverse Dim Inhibit signal so the mirror will not dim when the vehicle is in reverse, another says it's a supply voltage from a back-up supply (I guess so Onstar will still work in the event that the main evehicle battery is disabled in an accident). I'm pretty sure if 12v is applied to this pin, the mirror will not dim no matter what.

10 - Microphone (if mirror is equipped) 

11- keypad signal (out) for On-star (pressing any button puts out a 5v multiplexed signal on this pin, - so you can't just use the buttons to control whatever you want to. Sorry.)

12 - keypad supply (5v) voltage (in) for the buttons

13 - ignition voltage (12v -main power IN to the mirror)

14 - keypad green LED signal

15  - keypad red LED signal

16 - return line to the LH outside mirror for day/night signal

Apparently posts can't be edited, so I'll update my last one with a few things I've found out since I posted it.

earlybroncoguy wrote:

---

[

 After reading all the other posts in this thread and comparing the wiring data, here's a more complete list: 

Pin 1-not used

2 - Microphone (if the mirror is equipped with it)

3 - "Passenger Air Bag on" notification (if mirror is equipped with that display) - ground pin to activate icon

4 - "Passenger Air Bag off" notification (if mirror is equipped with that display) - ground pin to activate icon

5 - auto day/night signal, which comes from the LH outside rearview mirror

6 - Temp probe connection ( if mirror is equipped with display)

7 - Temp probe connection (if mirror is equipped with display)

8 -  Ground

9 -  After taking a mirror apart and experimenting, I've discovered that pin 9 is common with pin 8 - they are both soldered directly to the ground plane on the circuit board. So, it's a ground.

10 - Microphone (if mirror is equipped) 

11- keypad signal (out) for On-star - pressing any button puts out a multiplexed signal on this pin, - so you can't just use the buttons to control whatever you want to. Sorry.

  Update - Well, yes you can, if you do a little rewiring (arghh, arghh!). The 3 Onstar system buttons across the bottom of the mirror are rubber covers over membrane-type switches. The switches are actually part of the circuit board itself, but if you're VERY, VERY careful you can use an X-acto knife to cut the traces on the board from the trace ring land on the output side of the switch to the surface-mounted components. Then VERY, VERY carefully solder a small wire from the ring land to one of the unused pins on the back of the wiring connector for each switch (not the power switch, though - leave that one alone.) The input of the switches are all common to the main ground plane of the circuit board, so now when you press any of the switches you'll be sending a ground to whatever connector pin you soldered that switch's wire to. You can use this switched ground to activate the ground side of any relay, thus controlling nearly function on the car by touching one of the mirror-mounted buttons. They are momentary, though, so you'll need to wire in a latching circuit if you want that function to be constant on. 

There are also led's under each button which are normally only on whenever that function of the Onstar system is activated - but they can be hardwired to the kepad's 5v supply and grounded from other unused pins on the wiring connector if you want by employing the same rewiring technique above. They could be wired so that they only come on when the vehicle' s dash lights are on so they're easy to find at night.   

12 - keypad supply (5v) voltage (in) for the buttons

13 - ignition voltage (12v -main power IN to the mirror)

14 - Green LED signal (to the right of the Emergency button) - apply 12v to light LED.

15  - Red LED signal (to the right of the Emergency button) - apply 12v to light LED.

16 - return line to the LH outside mirror for day/night signal

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I just picked up a gentex mirror (not sure of model number) from a cadillac eldorado.  It has a three wire connection to it.  I do'nt know what is what.  It looks like, on the circuit board, it says + G and T.  What do I connect to where, for the mirror to work properly?  I am thinking + is constant 12V, G is 12V -, and T I don't know what that is.

Thanks in advance.

Turns out, that it is a motorized one.  There are 3 wires.  Pos/Neg, and that other connector, that says something like T.  Any ideas what that third wire is for?

Just completed sucessful conversion from 7-pin Gentex 177 with add-on Onstar module & mic to integrated 16-pin Gentex 261 (on 2000 Deville) thanks to previously posted wiring tables and data from local GM service dept.

Everything works perfectly.  I'll share any details needed.

i just picked up a GNTX-125 mirror. i figured out some of the wiring from here, but i still wanna know what the rest is.

the pinout is:
1 - 12v - Blue with white strip
2 - GND - Black
3 - RI - Purple with black strip
4 - +O
5 - -O
6 - DS
7 - BAT

my harness only has 3 wires, and i figured that the "O" connections are for the outside mirrors. i'm guessing that "BAT" is a battery connection. but i don't know what "DS" is for. i think it is door switch, to kill it when you open the door and the dome light comes on. i'm hoping that its for a trigger to the head lights, i'd like to have that.

any help would be greatly appreciated.
thanks

Going back to the discussion of the Gentex 156 self dimming rear viewmirror.There are five pins coming from the mirror.  They are marked: IGN, BAT, GND, RI, K1 and 0+.  Does anybody know what RI , and K1 and 0 + stands for.  Those are the markings inside the mirror for the connector pins.  Thanks again for the quick response.

Walter

I just hooked up a Gentex mirror with auto dim and compass.  When I hooked it up early today just to test, it worked fine, displaying compass directions as normal.  Now that I have completed installing it, it's gone goofy.  It doesn't give compass readings at all-it just reads "C", or what looks like a C to me.  During startup, it's lighting all the diodes, but after that just the "C".  I held the compass button down for a while, on the first try it cycled through "2" all the way through "15".  On all successive tries holding the compass button down, it briefly changed to a "2" display, then back to "C".

I have no idea what this mirror is trying to tell me!  Does anyone out there have a clue, or know where I can find the manual?

Thanks,

Dave Duff

It is asking you for calibrations.  The numbers it displays when you press the buttons are the US zones.  You have to find out what zone you are in and leave it in that number when the number is displayed.  Once you have done that it will work correctly.  If you can tell me where you are, state and city, I would tell you what the proper zone should be.  In one of the previous postings there is a link to mito corporation.  I think they have an installation guide that shows you how to calibrate them with the time zones etc. This forum has been very helpful to me.  I installed self dimming mirros in my 3 cars already.  Cool stuff and awesome web site.

Walter Medina Florida.

I have a Gentex with 5 pins, no harness. Any suggestions? I'm going to attempt to use the info already provided on this forum. Wish me luck all... If I blow this sucker up I'll post some links to pictures..

-Bryan

Hi,

Does anybody know if it is possible to re-use an existing vehicle t-probe for Gentex mirror?
What modifications are required (I assume resistance must be changed) ?
What are original Genex t-probe parameters?

I fogot to mention - I'm using GNTX-261 and GNTX-177.

Thanks in advance!

Gentleman wrote:

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The Gentex mirror I had seemed diffrent from what you are describing, it did not have the autoheadlight feature, it had 7 pins but only 5 wires as such:

1 Dark Blue    12V + Ignition
2 black        Ground
3 Violet       Back Up Lamp Connection
4 White        Side View Mirror +
5 Yellow       Side Vie Mirror -

4&5 were used to control side view mirrors that had a dimming feature.

Sorry I could not help

---

Try to calibrate it, if the problem persist maybe the "compass module" is damaged, the separate "extra box" is not a part of the mirror,  but I don´t known how it works.

Sorry for the spelling but my English is not good. if you have more questions maybe I can help you. 

Just to add some helpful wiring info for here...

(Chrysler) Gentex GNTX-101 Mirror wiring: (From left to right as you face the back of the mirror)

WHT/RED - +12vdc accessory input

BLK - Chassis ground

BLU/BLK - +12vdc reverse lamps input.  (Ground if not using)

Here is the mirror in question:

Now, I also have a Chrysler GNTX-104 with no wiring info...

The 2-pin temp probe connector is shown to the right under the plastic cover.  This unit apparently utilizes 2 foreward facing photoresistors to enable the high-beam disable function which I would like to use.

Does anyone have the wiring information for this one???

Thanks!

I didn't see the GNTX-126 listed, but here's what I know about it...

General Motors wiring as read from left to right while looking at the back of the unit:

BRN - +12vdc accy

BLK - Chassis ground

GRN - +12vdc reverse light input

GRY - (Unknown)

PNK - (Unknown)

Update on the GNTX-126...

GRY = +Output to side dimming mirror

PNK = -Output to side dimming mirror

Update on the GNTX-104 pictured a few posts ago:

WHT/RED = Accessory +12vdc

PNK = Constant +12vdc

BLK = Ground

VIO/BLK = +12vdc reverse inhibit input

ORG/WHT = Active low transistor output from auto headlights function

BRN = Second active low transistor output from auto headlights function

Hopefully others can benefit from this information.

I recently purchased a gntx-177 mirror supposedly from a GM product.  The wiring harness was cut but the wires from the mirror are red, black, white, blank, blank, light green and light green.  The mirror is auto dimming, temp and compass.  I also need the wiring harness and temperature sensor.  Any assistance on wiring and obtaining parts is appreciated.

rasal