First off, the trunk light only works if either the driver’s or passenger’s door is open. When I close the door, the trunk light stays on. It turns on and off using the trunk switch.
If I use the key to manually open the trunk, the battery current is initially 1.8 amp and then drops to .05 amp within a few minutes.
However, if I use the key fob to remotely open the trunk, the horn beeps, the headlights come on, as programmed to do. The battery current is initially 12 amps, and after a while drops to 1.8 amps. The current stays at 1.8 amps indefinitely, draining the battery.
If I use the key fob to remotely open the driver's door, the horn beeps, the headlights come on, as programmed to do. The battery current is initially 12 amps, and after a while drops to 1.8 amps. The current drops to 0.05 amps.
The dome, map, and trunk lights have been changed to an LED equivalent, if that matters.
I changed the trunk light switch, but this did not help.

 

Anyone ???

 

Hi `Gene, I'm anyone and sometimes >Someone.
I don't have the answer & searched for one & the closest I could come to a same or similar problem was on a Caddy Forum on a 2003 CTS (It's a GM product)...Check the below link & see if it contains anything that may help you until one of our expert tech member's makes a post...Good Luck!

p.s. What year & model is your Monte ? Any electrical Modifications ?


Battery drain on 2003 CTS appears to be on the trunk release circuit
click above link

 

Thanks. 2003 Monte SS. Stock everything. Dome light, map lights, and trunk light are LED.

 

Hi `Gene & you're Welcome, but I wish I had the knowledge to solve your electrical problem. I hope that one of our member's see's your thread (Problem & can assist)...I don't know if LED lights could cause this problem. Have you cleaned all your electrical connections that would affect your trunk remote ?

Wish you good luck on a resolve to this problem. You may have to seek out a expert in this area if no one responds. Lets hope a member does...