CarlL Posted December 7, 2009 Report Share Posted December 7, 2009 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. Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 7, 2009 Report Share Posted December 7, 2009 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 Link to comment Share on other sites More sharing options...
Eric Posted December 7, 2009 Report Share Posted December 7, 2009 Post any codes you have. "How To" tab at top tells how to pull codes. Link to comment Share on other sites More sharing options...
CarlL Posted December 7, 2009 Author Report Share Posted December 7, 2009 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. Link to comment Share on other sites More sharing options...
KHE Posted December 7, 2009 Report Share Posted December 7, 2009 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 Link to comment Share on other sites More sharing options...
CarlL Posted December 12, 2009 Author Report Share Posted December 12, 2009 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. Link to comment Share on other sites More sharing options...
caddypete Posted December 12, 2009 Report Share Posted December 12, 2009 Hmmm, apears that service manager was wrong. Thats probably a first. Link to comment Share on other sites More sharing options...
winterset Posted December 12, 2009 Report Share Posted December 12, 2009 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. Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 12, 2009 Report Share Posted December 12, 2009 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 Link to comment Share on other sites More sharing options...
vcee12 Posted May 5, 2011 Report Share Posted May 5, 2011 2004 deville intsrument panel not lighting up checked fuse any ideas thx vince Link to comment Share on other sites More sharing options...
joeb Posted May 6, 2011 Report Share Posted May 6, 2011 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. Link to comment Share on other sites More sharing options...
KHE Posted May 6, 2011 Report Share Posted May 6, 2011 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 Link to comment Share on other sites More sharing options...
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