2002 monte carlo diode isolation

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=127991
Printed Date: April 29, 2024 at 6:28 PM

Topic: 2002 monte carlo diode isolation

Posted By: blueatlanta
Subject: 2002 monte carlo diode isolation
Date Posted: July 20, 2011 at 8:27 PM

I am installing a remotw start, keyless, etc alarm on a 2002 monte carlo and the diode isolation is driving me crazy.

As it stands, I have the negative door trigger wire coming from the alarm brain to the blue and blue/white wires coming from the BCM.

From the door triggers, they pass through a diode, then continue on to the BCM/Piggy-backed door trigger alarm wire. This gives me a false trigger when the BCM grounds out.

I am having the same issue with the parking light negative wire (white wire on BCM). Giving me the Service Engine Soon light when the remote start is used.

Replies:

Posted By: mikvot
Date Posted: July 20, 2011 at 8:39 PM

You will need to 1076 the door triggers. For park light I've always used BROWN / white (+) coming from the switch. You can find a 1076 diagram in the download section.

Posted By: kreg357
Date Posted: July 20, 2011 at 8:46 PM

Relay isolate the Parking light wire away from the BCM. Wire SPDT relay as follows:

Relay Pin 86 to (+) Parking Light output of remote starter. ( Set R/S for (+) Parking Light output )
Relay Pin 30 to vehicle side of cut White Parking Light wire.
Relay Pin 87A to BCM side of cut White Parking Light wire.
Relay Pin 85 and 87 to chassis ground.

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Soldering is fun!

Posted By: blueatlanta
Date Posted: July 20, 2011 at 10:14 PM

kreg357 wrote:

Relay isolate the Parking light wire away from the BCM. Wire SPDT relay as follows:

Relay Pin 86 to (+) Parking Light output of remote starter. ( Set R/S for (+) Parking Light output )
Relay Pin 30 to vehicle side of cut White Parking Light wire.
Relay Pin 87A to BCM side of cut White Parking Light wire.
Relay Pin 85 and 87 to chassis ground.

informative. and thanks, but i found out i just needed to get to the light blue headlight switch wire. will try door/trunk triggers tomorrow.

Posted By: blueatlanta
Date Posted: July 20, 2011 at 10:39 PM

mikvot wrote:

You will need to 1076 the door triggers. For park light I've always used BROWN / white (+) coming from the switch. You can find a 1076 diagram in the download section.

that makes sense! thanks! double diode it

Posted By: blueatlanta
Date Posted: July 30, 2011 at 3:50 PM

just fyi, the light blue wire from the headlight switch will give you the service engine light as well as keep the low current headlights on.

Posted By: kreg357
Date Posted: July 30, 2011 at 7:00 PM

Using the White (-) Parking Light wire at the BCM with the relay posted above will work and not cause the "Service Engine Soon" light.

Haven't tried mikvot's way but his suggestion agrees with this info from Bulldog and DEI :

PARKING LIGHTS ( + ) BROWN / WHITE (+) @ PASSENGER SIDE JUNCTION BLOCK ABOVE KICK PANEL

How did you end up doing it?

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Soldering is fun!