98 chevy s 10 dome light and alarm

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=97417
Printed Date: May 06, 2025 at 10:20 AM

Topic: 98 chevy s 10 dome light and alarm

Posted By: kryptic
Subject: 98 chevy s 10 dome light and alarm
Date Posted: September 25, 2007 at 11:46 AM

I purchased my truck several years ago with a Karr Alarm from the dealership.

1) I've noticed that every time after I arm the system, the dome light stays on for 20-30 seconds and then the alarm chirps again after the lights turns off; and

2) If I push in the "dome light override" button (turn of dome lights) and arm my system, the alarm won't sound/activate when I open the door(s).

Questions:

So (1) is there a way to have the dome lights turn off immediately once the door(s) close? (I prefer to have the dome lights activate when I disarm it); and second, I believe something is wrong with (2). What can I do to fix that problem? Is it faulty wiring?

Replies:

Posted By: kola7126
Date Posted: September 25, 2007 at 5:50 PM

DOOR TRIGGER	See NOTE * 2	@ BCM, See NOTE *1	14301_S-SERIES-PICKUP_(-) NEGATIVE DOOR PIN ISOLATION CIRCUIT.pdf
DOMELIGHT SUPERVISION	WHITE (-), Requires #775 Relay	@ UNDER DASH LIGHT

NOTES

NOTE *1 the BCM (Body Control Module) is located to the RIGHT of the Gas Pedal, attached to the Heater box. The BCM has 3 Plugs that face the Drivers side of the Vehicle. On the BCM is printed the colors of the 3 plugs, PURPLE, BLUE and BROWN

NOTE *2 This vehicle has (2) door trigger wires, the TAN (-) at the PURPLE Plug, Pin B4 is for the DRIVERS DOOR, and the ORANGE (-) at the PURPLE Plug, Pin B2 is for the PASSENGER DOOR. When installing an ALARM SYSTEM, use BOTH DOOR TRIGGER wires and DIODE ISOLATE. to connect, Alarm`s door trigger input must be connected to door trigger, but not connected to dome light overrid button.

Posted By: kryptic
Date Posted: September 26, 2007 at 2:02 AM

Thanks Kola7126! That helped. Am gonna go ahead and try it this way.

For the door triggers, are they a negative input? if so, for the diode, does the cathode face towards the BCM?

May i have a link the to the pdf file? this one is not working?

Thanks again for your help.

Posted By: kola7126
Date Posted: September 27, 2007 at 1:12 PM

Yes, negative input, and cathode face (strip marked) towards the BCM.