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Up to Date DirectWire for 2003 BMW 325i

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=143483
Printed Date: March 28, 2024 at 5:15 AM


Topic: Up to Date DirectWire for 2003 BMW 325i

Posted By: chem.eng
Subject: Up to Date DirectWire for 2003 BMW 325i
Date Posted: August 20, 2017 at 1:13 AM

I have read through many posts and seen many recommendations for wiring information sheets online and here. The vehicle is a 2003 BMW (E46) 325i Sedan. The most recent DirectWire Vehicle Wiring Info for my vehicle was posted in October of 2006 on here and nothing in the download area. I was wondering if someone could post the most current wiring information here or even better as a pdf in the downloads area for my vehicle from DirectWire as I plan on installing a Viper System from Directed. Just looking for the most up to date information and recommendation from Directed when installing a remote start/security system in my car. The information I currently have does not mention any diode placement or tips and I have read several recommendations online for them.

Thank you for anyone willing to help me with this.



Replies:

Posted By: i am an idiot
Date Posted: August 20, 2017 at 4:15 PM
They do not update this info. The 2006 info is accurate.




Posted By: chem.eng
Date Posted: August 21, 2017 at 10:43 PM
The reason I ask for this is that most posts recommend adding additional diodes that are not mentioned in the wiring information sheets. The 2006 Wiring information sheet posted here is for the UK version 3 series. I have a 2003 BMW 325I from the United States. So I am unsure what may be different between the two vehicles. Does anyone have access to this information and be able to tell me where to add any diodes and any more recommendations for this vehicle when installing a remote start/security system to my vehicle?




Posted By: mgoetz74
Date Posted: August 28, 2017 at 10:21 AM
https://www.directechs.com/VehicleCompatibility.aspx?p=-1&v=4519&ps=1&s=0&c=0&pr=-1




Posted By: mgoetz74
Date Posted: August 28, 2017 at 10:23 AM
12 Volts
Second 12 Volts
Starter
Ignition
Second Ignition
Power Lock
Power Unlock
Lock Motor
Driver Unlock Motor
Passenger Unlock Motor
Factory Alarm Arm
Factory Alarm Disarm
Parking Lights (-)
Left Front Door Trigger
Dome Light
Trunk/Hatch Pin
Hood Pin
Trunk/Hatch Release
Tachometer
Speed Sense
Brake Wire
Horn Trigger
Left Front Window (Up/Down)
Sun Roof (Open/Close)
     

Wire Color
red/blue
red/green
black/blue
green
violet
blue/red
white/black
white (any one of 5)
blue
(chassis ground)
arms with lock
disarms with unlock
see Tech Doc 1055
red/blue
comes on with unlock
white/brown
violet/green
gray/green
black
yellow/green
brown/gray or brown/white (functions with ignition on only)
violet/blue
use power lock/unlock
use power lock/unlock
     

Polarity
+
+
+
+
+
-
double -
5 wire
5 wire
+
-
-
+
ac
ac
+
+
     

Wire Location
ignition harness
ignition harness
ignition harness
ignition harness
ignition harness
General Module behind glove box, middle 54 pin plug, pin 22
General Module behind glove box, middle 54 pin plug, pin 20
General Module behind glove box, middle 54 pin plug
General Module behind glove box, middle 54 pin plug, pin 35
General Module behind glove box, middle 54 pin plug, pin 18
driver kick panel
General Module behind glove box, left 26 pin plug, pin 7
General Module behind glove box, middle 54 pin plug, pin 17
diagnostic plug in passenger rear of engine compartment or data link connector under driver dash
instrument cluster, 26 pin plug, pin 19
brake pedal switch
horn relay above General Module, green relay to right of orange relay


this is directly form directwire. there is no mention of any diodes just a relay for the parking lights




Posted By: mgoetz74
Date Posted: August 28, 2017 at 10:25 AM
sorry that didnt come out as planned. it is in order if you start with the top and work your way down. sorry about that




Posted By: chem.eng
Date Posted: August 28, 2017 at 11:07 AM
Thank You mgoetz74 for letting me know that they do not mention the use of any diodes on their site. I have no access to any of the Directech DirectWire information in the link, it asks me to sign in.

Thank you again for the information you posted.




Posted By: howie ll
Date Posted: August 30, 2017 at 1:19 PM
Sorry to come late here's the indicator info for that vehicle. Pull the lighting switch to access the wiring, UK spec vehicles.
BMW Indicator positions



POSITION     COLOUR     PIN
Left front     Blue/Green     50 diode 1N5404
Left mid     Blue/Yellow     18 diode 1N4004
Left rear     Blue/Green     1 diode 1N5404
Right front     Blue/Brown     11 diode 1N5404
Right mid     Blue/Yellow     3 diode 1N4004
Right rear     Blue/Brown     43 diode 1N5404


Now here's some priceless advice!:-
Use a valet key in a DEI 556U box, wired as Euro type, i.e. cut and join no loop. Using a regular key will give you lock/unlock problems plus valet key = £30.
Connect IGN 2 (pink/white Viper) to purple ACC, don't connect orange from Viper.
Brakes, black/yellow at 16. DON'T use the supplied info, wiring is different between UK and US. That wire is at the lighting switch. You might need to cut and join that wire via a relay, either end to 30 and 87a, Constant 12 volts to 86, secondary starter wire (-) violet/yellow from 24 pin Viper plug to 85 1N4004 diode across 85 and 86, band to 86.
Tach and POS door trigger are at puddle light (red/blue) and OBD socket (black pin 9) adjacent to each other,
Lock is red/blue, extend timing for total (comfort) close. Unlock white/black both NEG in loom at far end, driver kick panel going to door.
Boot release, light green/grey, POS use a relay.
Trunk trigger white brown. Easiest place for last two, right hand floor loom rear of driver seat.
All this work is right hand under dash. Plus siren and bonnet switch, right hand side through grommet above throttle, comes out behind brake servo. Join to brown/green (test) on plastic bonnet switch siren on suspension mount.
Boot lights. to avoid falsing 1N4004 diodes in line to bulbs, one each side.
That's the version for E46 98-04 I wrote for Clifford.




-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.




Posted By: chem.eng
Date Posted: August 31, 2017 at 1:20 AM
Thank You Howie II, this is the information I was looking for. I would just like to clarify with you since my vehicle is a United States version 2003 BMW 325i which is the correct way you mentioned for me. On my vehicle I will not be wiring each light with a diodes as you first typed, and on my vehicle I will have to cut into the light switch harness (4th wire from the left from Techtip 1055) and add a relay to control the parking lights?

You mention the addition of a diode to the relay between pins 85 and 86, what purpose is this diode serving? Is it to protect the remote start module or something else?

What is "Brakes, black/yellow at 16"? I do not have see this anywhere in my wiring information. I have the Brake wire shown as brown/white wire at brake switch?

Do you recommend any other diodes added to a remote start/alarm install on the US 2003 BMW 325i?

Sorry if I misunderstood anything you told me. You are obviously very knowledgeable about this subject on this vehicle and I appreciate all the help you provide.   






Posted By: howie ll
Date Posted: August 31, 2017 at 1:42 AM
I misunderstood you!
Stick with your method for the lights and go to the brake switch.
The diode on the relay protects your unit from the EMP spike when a relay shuts down.
If you go to the brake switch you shouldn't need the relay.
All other factors still apply.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.




Posted By: chem.eng
Date Posted: August 31, 2017 at 9:34 AM
That's awesome Howie II, thank you for all the advice. That's great I can wire the brake switch and eliminate the need for a relay. Thanks Again





Posted By: howie ll
Date Posted: August 31, 2017 at 5:12 PM
Just a point, although I originally thought we were dealing with a right hand drive vehicle, everything I mentioned is of course now on the left under dash except for the floor loom, that's still on the right (trunk release and trunk trigger).

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.





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