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Chevrolet Impala, Lights, Electrical, Sedan
Apr 03, 2007 (8:20 pm)
I have a 2000 chevy impala and if I adjust the brightness of the lights inside of the car like on the instrament panel then I hear wierd noises from the speakers and then the radio doesn't work but if I adjust them really dim then the radio will have noise. But no here lately there is always this noise coming from one of the speakers well I think it is one of them anyway. Would anyone know how to fix this problem??
#169 of 447 2002 dash/DIC not working
Apr 04, 2007 (4:00 pm)
I've read through ALL the forums searching for a possible solution to my problem and I haven't exactly found what I was looking for...
My car starts up fine, but many times when I start it non of the guages, radio, A/C, OnStar, Cruise, etc. will work. Turn signals and hazards work fine.
Took it to the dealership one day when it was actually acting up, and the guy said he wasn't getting any error codes on it at all...which I believe, I was standing right next to him in the parking lot. Checked all the fuses, no issues there. He says it could be an ignition switch, but not sure. I'm reading that it's possible it the bcm.
By the way, this usually only happens when it's warm outside. I'm from NE OH, so yesterday when it was 80, they didn't work at all. Today it was 35, and everything worked fine.
#171 of 447 Re: 2002 dash/DIC not working [essilem]
Apr 05, 2007 (3:03 pm)
The BCM is the catch all diagnosis for GM cars these days. It does seem to be responsible for so many of the basic functions of the vehicle and whenever the car starts acting weird, it tends to be the BCM behind it all. Unfortunately, it's hard to diagnose for certain and it isn't cheap to replace. About the only bit of help I can give you is that with electronics, heat will play a role and the fact that yours seems to "behave" better in cooler temperatures would lend to the theory of a cracked circuit board, possibly in the BCM, that is aggravated by the heat. Any chance that on the days that it works, does it get worse later on in the day as the weather warms and the car has been used? That would point further toward a cracked circuit board.
#172 of 447 Re: 2002 dash/DIC not working [quietpro]
Apr 05, 2007 (4:24 pm)
Yes, as a matter of fact, it does get worse later in the day and/or after the car has been used. Today (27 outside) everything worked first thing this morning, but I had to make a stop on my way to work. The car only sat for about 1/2 hour to 40 minutes, and of course, then when I started it back up, things were not working. However, after the end of my work day, everything was back to normal.
I really appreciate the info!!
#173 of 447 Re: 2002 dash/DIC not working [essilem]
Apr 05, 2007 (5:23 pm)
To be fair, I'm no expert, just an educated guess. I work on computers and used to work on bombers for the air force. But, some of the electronics principles still apply. I do feel for you, it's a tough situation to be in. Good luck in whatever you decide.
#174 of 447 Body Control Module
May 11, 2007 (6:43 am)
I think I got ripped off by dealer replacing the BCM for $723.58. 2000 Impala LS with 63,000 miles and car wouldn't start except by jumping. When the car was turned off all sorts of funny things happened, Radio turned on and off by itself, dash lights blinked on and off, funny noises from fuse boxes. We check the battery and everything was OK.
Dealer charged $142.95 for diag. test with the following codes B1000, B1004, B1339, B1349, B1440. $233.93 for new BCM and $297 for labor and other stuff for a grand total of $723.00! I think the charge should have been closer to $400.00.
I have tried to contact GM, but no luck so far!
#175 of 447 Another 02 Impala Battery Drain -- need some help
Jun 13, 2007 (5:44 am)
I have a 2002 LS model with 81,000 miles. Everything is stock (radio, etc.). I have a parasitic draw on the battery that leaves the battery dead overnight.
I have pulled the negative terminal off the battery and put in an amp meter. After about ten minutes the draw hits a cycle of 1.86 amps for about 20 seconds then down to 0.04 amps for about 6 seconds, back to 1.86 amps, etc.
I notice a clicking sound under the dash and a faint hissing sound on the radio during the cycle. If I pull the CLSTR/BCM fuse there is no draw at all. If I pull only the radio fuse, I get the same cycle, but with 0.48 amps for 20 seconds down to 0.04 for 6 seconds. I have replaced the RAP relay and no change.
If I pull the fuse for the BCM no change. I have read some posts that the BCM can get fried if you jump start the car (which I had to do about 4 months prior to this problem). How do you know if the BCM is bad? Do you guys have any other suggestions?
#176 of 447 Re: Another 02 Impala Battery Drain -- need some help [padrefan19]
Jun 13, 2007 (6:31 am)
Typical good radio draws ~1mA (or 0.001A) in sleep mode.
In typical GM vehicles, the power to radio is supplied by some Power control module. The cycling of 12V on that module could cause radio to re-initialize (with high power), then goes back to sleep. Normally radio get the permanent 12V from this module. It will go to sleep by itself after the IGNITION signal is off (from 12V to 0V, on your Impala) or told to go to sleep by IGNITION off message on vehicle bus (on newer Impala). Within 1-2 minutes, radio would be drawing 1mA only instead of 0.5A.
#177 of 447 Re: Another 02 Impala Battery Drain -- need some help [jnt]
Jun 15, 2007 (10:30 am)
jt -- thanks that info helps....