Courtesy Lights Stay ON & Run Battery Dead

[happydog500]

I see mine is a 97, not sure it will be the same as 95, but could be. It may have another "Diagnostic Mode Procedure or not at all.

Here is my post I did about it.
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WOW!! GM Diagnosis is GREAT!!

.....So many things it could be, each door has a door handle switch, could be the BCM, dimmer swich, short in a wire.

I got my good old GM Service Manual and did the Interior Lamps Diagnosis.

Ignition Switch to RUN,
Press and hold the power unlock switch,
Cycle the Headlamps 6 times,
Release the Power Unlock Switch.

I pulled the front LH door open. Heard one Bong. Did each door, with a bong each time. I turned the headlights on, Bong.
I then turned the Interior Lamp on, no bong.

This took a total of about a minute. It was soooo cool, I did it again, with the same results.

A couple years a go, the Dealer told me it would be a lot of money to do an electrical diagnostics. "They would have to get in and check a bunch of wires. Electrical stuff gets real expensive, quick." Took me about a minute.

This GM Diagnosis is GREAT!!!

Chris.

[CarDude225]

@BlueBowtie
Thank you for the wiring diagram BlueBowtie; it may prove to be useful at some point. However, I suspect your diagram to be from a year newer than a 95 LeSabre.

Originally Posted by Blue Bowtie

1995 uses an interior lamp relay (Relay F) in the relay center just to the right of the glove compartment. It is controlled by the RAC, mounted just below that relay center. The chime module is also located there, so try to identify the module by the connector with ten wires (2 X 5)....

There is no RAC module, or chime module that I can see, below the relay center. There is a BCM next to the relay center behind and to the right of the glove box. Your diagram shows approx. 24 wires coming from the RAC module. My BCM has 8+5=13 wires coming from it. My BCM looks nearly identical to this with the exception of the the handwriting (and has this number stamped on it: 25615094):




@Happydog500
Thank you for the diagnostic info. I don't think my 95LeSabre has this feature but I will try it.

[Blue Bowtie]

Sorry, let's try again. I updated the drawing. That one IS for a 1995 Le Sabre.

[CarDude225]

@Blue Bowtie
That diagram is EXACTLY what I am looking for. Thank you. Now I know I need to trace down & temporarily cut the dark blue wire coming from the PANEL INTEROR LAMP CONTROL.

[CarDude225]

OK...I finally got into the wiring again. I removed the relay/fuse center and took the back cover off and identified 2 dark blue wires going to the courtesy light relay. I took a gamble and cut one of the wires and viola it was the right one. Now the dash courtesy light switch no longer works which is exactly what I wanted to do.

For anyone interested, the wire I cut is the wire that is closest to the perimeter of the relay center.

Now only time will tell if the short was in the dash courtesy light switch circuit which has now been removed from the equation.

Connected the relay again and confirmed repeated correct operation. Now to observe carefully day after day to make sure the courtesy lights go off automatically every time.