791xv and my air conditioning
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=62870
Printed Date: May 31, 2024 at 6:42 PM
Topic: 791xv and my air conditioning
Posted By: Steve23
Subject: 791xv and my air conditioning
Date Posted: September 18, 2005 at 8:43 PM
I installed my system about a month ago and at the time I couldnt get the ac to work with the remote start. The fan comes on but doesnt blow cold air. Does anyone know what color wire I should have tied into and with what wire from my alarm to make the ac work?
Thanks guys
Steve
Replies:
Posted By: JWorm
Date Posted: September 18, 2005 at 9:27 PM
***looks into crystal ball....and sees nothing****
For some reason my crystal ball is broken today. Year, make and model of your car?
Posted By: Steve23
Date Posted: September 18, 2005 at 9:35 PM
Sorry about that. Wasnt thinking straight when I posted.
Anyway its a 95 ford f350 diesel.
Thanks
Posted By: JWorm
Date Posted: September 18, 2005 at 9:40 PM
Your truck should have 1 ignition wire and 3 accessory wires.
Ignition - RED / lt. green
Acc 1 - Grey / YELLOW (14 ga.)
Acc 2 - BLACK/ green (14 ga.)
Acc 3 - Grey / YELLOW (18 ga.)
You will need to add a relay to power the 3rd accessory wire.
Posted By: Steve23
Date Posted: September 18, 2005 at 9:54 PM
Thanks man. How do I wire that relay in.
Steve
Posted By: blazeronspokes
Date Posted: September 19, 2005 at 3:13 PM
85-neg 86-2nd acc output from alarm 87-positive 30-output to 3rd acc wire(be sure to diode isolate these wires)
Posted By: blazeronspokes
Date Posted: September 19, 2005 at 3:13 PM
also diode isolate 86.
Posted By: Steve23
Date Posted: September 19, 2005 at 4:47 PM
Ok so the 2nd acc wire goes both to my relay and to the second acc in my ignition harness. Also the diodes should face the ignition harness, right?
Posted By: JWorm
Date Posted: September 19, 2005 at 7:46 PM
Although blazeronspokes's method would technicaly work, there are better ways to do it.
The relay pack has a spot for a 4 pin harness to plug into. You probably didn't use it when you did the original install. It will have 4 skinny wires - pink, purple, orange and blue. You will use the orange wire.
Relay:
87 and 86 - fused (15 amp will be fine) constant +12v
85 - skinny orange wire
30 - 3rd acc. wire in car.
Posted By: Steve23
Date Posted: September 19, 2005 at 9:19 PM
Jworm, do I need to diode isolate any of those wires?
Thanks
Posted By: mo12v
Date Posted: September 19, 2005 at 10:36 PM
You can call # 2,3, & 4 Accessories, but I wire 1 & 2 up as Ignition 1 & 2.
You can also DIODE Isolate for Installation time, but Relays ( i feel ) are the safer method. Ignition Switch Layout:
Starter................RED / L BLUE
Ignition #1............RED / L GREEN (Primary Ignition).
Ignition #2............GRAY / YELLOW (2) (Powers Blower Motor). * Ignition #3............BLACK/ L GREEN (Heat/Ac Controls).
Igntiion #4............GRAY / YELLOW (Keeps Air Bag Light Off).
* 2 Of The 3 GRAY / YELLOW Wires Listed Are The Same Circuit.
(Glow Plug Wire: PINK/BLACK At P.C.M. Pin 80) ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: JWorm
Date Posted: September 19, 2005 at 11:17 PM
Steve23 wrote:
Jworm, do I need to diode isolate any of those wires?
Thanks
No diodes needed.
Posted By: Steve23
Date Posted: September 20, 2005 at 4:05 PM
Thanks for the info guys, today I got everything working.
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