2006 Grand Prix Battery Drain

[wratchetjaw]

My 2006 GP V6 (base model) is pulling 4 amps with the car turned off. So far I have narrowed the problem dowm to the "Main Batt 1" fuse. It seems to be tied in to another problem with the headlights sometimes remaining on when the keyless remote is used to lock the car. The car is pulling 4 amps even with the headlights, and all other lights off. I am wondering if the Keyless Remote system is defecive and leaving something else on that is connected to it.

Anyone have any suggestions of where to go from here, or know what all the "Main Batt 1" fuse is connected to?

Thank you

[tblake]

Welcome to AF.

4 Amps is a huge drain.

May want to stat pulling fuses to individual components to see if you can isolate the drain. From what I remember newer GP's have blower motor modules that get direct B+. I think I remember of hearing issues with these remaining on and causing a drain.

[Scrapper]

yes you have a huge drain like he sais. something has a bad short in it try taking neg. cable off when not driving it and when you hook it back up you will have a strong spark but be carful;. you did have battery and alt. tested didn't you? could also be in starter shorting out. first i'd is take neg. off and then when you hook it up theres probably be big spark but make sure every thing off on car.

[richtazz]

Tim, you are correct about the blower modules on the 04-up GP's sticking and remaining on causing a battery drain. Since your little chart there shows the HVAC system is in fact fed through the circuit in question, it would be the first thing I would check. Normally you'll hear the blower motor running, but not always.

[Mickey#1]

You should be able to narrow this down further by removing each of the fuses under the dash until you find the one causing the drain.

[BNaylor]

I would remove the fuses associated with the battery only for now. The BATT MAIN 1 is what feeds components that are hot at all times regardless of whether the ignition switch is on.

If the HVAC circuit is causing the parasitic battery drain then you will most likely hear the blower motor running based on cases I've reviewed with the '04 and up blower motor module and not CJ2 ACC systems.

RFA/MOD and the BCM (Body Control Module) probably most likely areas. I recall RFA/MOD is the remote keyless entry receiver and associated circuits.

[BNaylor]

Originally Posted by tblake

From what I remember newer GP's have blower motor modules that get direct B+.

Tim, the '97-'03 GPs with the manual HVAC systems non CJ2 and blower motor resistor got B+ direct from the battery too. Via the blower motor high speed relay (For Fan Position 5) located directly on the blower motor resistor. Hot at all times. We had similar issues with '97-'03 GPs where there was a battery drain and the blower motor kept on running with ignition to OFF.

[tblake]

Good to know Bob. So the 97-03 GT's and GTP's with automatic climate control, their blower motor module is not directly fed with B+, thats just the ones with manual hvac controlls?

[BNaylor]

Originally Posted by tblake

Good to know Bob. So the 97-03 GT's and GTP's with automatic climate control, their blower motor module is not directly fed with B+, thats just the ones with manual hvac controlls?

What I was getting at is the CJ2 ACC systems normally do not have the issue above to my knowledge. Battery drian and blower running with ignition to OFF. However, both manual and automatic systems have B+ (hot at all times) via the high blower fuse into the blower motor control module or blower motor resistor. Also, the A/C clutch relay has contacts that is hot at all times on one side.

[TexasG8]

Sorry to bring up a old thread but I am having the same problem.

Have a 2D 97 gtp Turbo.
the battery was dieing everyday. I found out that when I shut the doors and armed the alarm the lights on both doors would stay on and also the two little floor board lights under the dash but every other light turns off.
Also when I'm driving the radio will turn off then back on In 5 seconds and when the radio turns off the windows don't work.
The aftermarket alarm has been on the car for a couple years. It stopped working last year. The car sat for a couple months. Took it back to the alarm place and they said they just had to reprogram the remotes and the alarm works but now I have this issue.
Un hooked the amp, un hooked the alarm, unplugged the inside lights and trunk light and something is still draining the battery.

Ok checked the fuse box. With the key on all the fuses have the same power. With the key off and doors closed I have 12 fuses that have power all the time and all the fuses are in the same 3 rows up and down.
AUX/CNSL
HSEAT/LUM
PWR MIR
STOP LAMP
HAZARD
PWR LOCK
CIG LTR
INT LAMP
RAP
R DEFOG
HVAC HI
CD CHG

Well I changed the BCM and I still have the same problem. I am getting power to the fuse box all the time even with the car ignition off.


Thanks for the help.