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2000 Deville - Instrument Panel black after dead battery


CarlL

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2000 Deville DTS. Battery was dead after 10 days of non-use. Charged battery over night and then started car. The instrument panel is completely black as is the HVAC panel. The other parts of the dash all work. Also, the automatic parking brake release stopped working at the same time.

Are there any fuses, circuit breakers or relays that I should look for? Is there a code that might show what is wrong, or is some computer box fried? I would like to look for the simple things before having my wife taker her car to the dealer for a check and repair.

Any help would be appreciated.

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Try disconnecting the battery for 5 minutes, disconnect the negative cable

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thx

Will check for codes tonight when I get home. One thread said that an owner was able to get lights back by reading and then clearing the codes. I will try that before I pull the seat cushion to disconnect the negative battery cable. The service manager at the dealership I called said that disconnecting the battery would not solve the problem. However, It is still worth a try before paying to have a repair.

If I am not successful, I will post the codes tomorrow.

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I would suspect a blown fuse first. Look at the fuse panel under the back seat next to the battery and check the "instrument panel" or similarly labeled fuse.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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OK, finally got to check out the problem. No codes, no bad fuses. I disconnected the battery and left it for an hour. After reconnecting, everything works! I have no idea what the problem was. Perhaps some of the relays needed to reset.

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You deep cycled a battery on the onset of winter. If the battery is older than 4 years, you might want to save yourself grief, and just replace it. An old battery is typically put over the edge with just one deep cycle. If you don't replace it, make sure you and your wife keep an ear out for slow starts etc.

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OK, finally got to check out the problem. No codes, no bad fuses. I disconnected the battery and left it for an hour. After reconnecting, everything works! I have no idea what the problem was. Perhaps some of the relays needed to reset.

No its not that the service manager was wrong, its that I was correct. This is not the first time this problem was corrected by disconnecting the battery (based on my recommendation), and disconnecting the battery the last time corrected the problem. Did you erase all of the codes?, or were they erased by disconnecting the battery?

While pulling the back seat was a PIA, you probably could have found the ground from the battery connected someplace on the engine under the hood, that could have been disconnected, just a thought

Ill thank myself, Thanks

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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  • 1 year later...

the car has a positive connection for battery under hood. there is also a negative connection as well under hood? what gauge wire is the negative cable from battery to under hood location? you would think the negative cable from battery would ground to a location under seat. maybe it does.

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There is a ground connection for jumping under the hood but it is a bracket that connects to the engine. The actual ground connection from the battery to the chassis is under the back seat.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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