As I started my Vette today to begin the trip home from the bank, I was greeted by all kinds of messages and audio sounds from my in dash message center. First of all the air conditioner wouldn't turn on, the ABS light was on, the power window on the passenger side wouldn't go down, but the driver side worked fine, the fuel gage went to empty, the oil pressure pegged to maximum pressure, but the voltage gage read ok, and a "reduced power" message came up on the DIC. The car started and drove fine (it didn't seem to be a power reduction) , so I drove the short distance home, disconnected the battery ( -negative terminal) and let the car sit for a couple of hours. After lunch, I reconnected the battery, the Vette came to life and NO more gemlins. So, any suggestions as to what may have caused all those "glitches" at the same time? I did have the doors locked when I went into the bank and was wondering if my dilemma could have been associated with unlocking the doors???? Strange to say the least!!

Any ideas or ideas would be appreciated. Maybe the Vette thought that I was in the bank to get a loan for a newer model, thus making a statement that it really did like its home and didn't want to be traded.

Bronk

 

How old is your battery? Sometimes when it begins to go bad all sorts of electrical gremlins appear.

 

Good place to start

Chuck

 

Check your grounds. On the left front side of the car, sitting on top of the frame (You can see it once you open the hood and look down in front of the brake booster) you'll see a Gang ground. There is one bolt that screws into the frame, and off to one side is the gang connecter. disconnect the connector and see if you have any corrosion in there. There also a groung on the passenger side. Grounds often get dirty and corrosion from washing the car over a number of years. Good Luck !

 

 

I'd bet that you need a new battery!

 

You may also want to run the codes and see if you get LDCM & RDCM codes. If you do check inside the tube in the drivers door. It goes from the front jam to the door (accordian tube). Look in Bill Curlee's sticky in the tech section
http://forums.corvetteforum.com/c5-t...tion-long.html

 

Definitely pull DTCs first. Then start looking for an electrical issue. Battery, ground and that wire in the door that will fray, as mentioned above.

My guess is you had a total communication failure on all systems for some reason.

Most likely by disconnecting the battery you probably cleared any DTC that was set and that's why it's back to normal.

With electrical complex vehicles, always look to a power, ground or short in a circuit. Especially when they go wacko.

Good luck.

 

As stated battery and grounds are a great place to start good luck

 

Thanks for all the responses and the great suggestions. I shall start with the most obvious first (check battery) and clean grounds. I am hopeful that those actions should and will take care of the problem. Thanks again - it is much appreciated.

Bronk

 

(repost from awhile back by me)


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I've been lurking for weeks trying to self diagnosis my problem. What happened about three weeks ago all the warnings came on and it said check tire pressure, low power mode, check active handling. Had no power windows, what a mess. So being the do it yourselfer I am, I disconnected the battery and it temporally fixed it for the last 1,000 or so miles. And now it.
's back, can't clear it what ever I do it keeps coming back. Also lots of trouble codes, I mean LOTS! Like 24.
I notice that when it was sort of working ok the memory seat doesn't always work every time, also when I drove it at dark in the morning about 1/2 mile from home the lights would dim slightly for a brief moment then be ok. If I need a PCM where's a good place to get it from. I did clean and check the grounds under the hood, 4 of them and they were super clean to begin with. The car has 30,000 miles and is in terrific condition. when I relearn the PCM clear the codes it runs great, then it starts usually with the buttons not functioning on the drivers door, then the active handling light coming on then after a few sec's everything goes REAL WACKY. I need help TIA Dan from MI

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Hi All- on the way to work this morn it did it again. After clearing all codes the dr door switches were still inoperable. So I opened the door and grabbed the wires in the dr opening and moved them back and forth while pushing the buttons and then the switches started working. I think the dr door harness is where the problem is? I talked to a service eng. at GM this morn and he said that’s the place to start if it was a BCM it wouldn't be intermittent like I'm having. He said harnesses that pass thru doors is a big problem.

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His fix for me:
Power door lock or power window may be inoperative or intermittently may not work from one of the doors.



Recommendation/Instructions:

While attempting to operate the function, grab the conduit of the C201
connector and move it back and forth. If the function now operates, check
corresponding connectors to ensure that all of the connector pins are fully
seated and are free of any corrosion.

Care should be taken to check for a deformed (too large internal diameter)
female pin. Replace loose/damaged female terminals in connector. Usually
terminals A, B, C (power and/or ground) C200 and C201 are located in
corresponding "A" pillar just inboard of door hinge area harness
conduit/pass-through.
-It's fixed, good as new