LarryMB Posted October 19, 2006 Report Share Posted October 19, 2006 I recently picked up a 99 Deville from a Bank as a repo. My First Caddy and I'm really impressed by it. Best car I have ever owned and its used... Other then a few minor problems this wonderful vehicle has one that perplexes me. For some reason the entire electrical system seems to shut down and reset every 24 hours (approx). When this occurs I can not use the remote to unlock the doos. I have to enter with the key and start the vehicle. When I do this the alarm goes off and I just hit the remote unlock button to shut that off. My trip meter and radio have reset. After that the car is great until the next morning when it all happens again. Has anyone else encountered a problem like this and what could possibly resolve it? Thanks, Larry Link to comment Share on other sites More sharing options...
Ranger Posted October 20, 2006 Report Share Posted October 20, 2006 Welcome. That is very strange. Not sure we have ever heard that one before. Pull the DTCs (Diagnostic trouble Codes) by simultaneously pressing and holding the OFF and WARMER buttons til the dash lights up. DTCs will be displayed on the bottom. Write them down and post back or decifer them here http://myweb.accessus.net/~090/dtcobd2.html. Link to comment Share on other sites More sharing options...
KHE Posted October 20, 2006 Report Share Posted October 20, 2006 Are there any aftermarket electrical items on your car such as a remote starter or aftermarket alarm system? Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
MAC Posted October 20, 2006 Report Share Posted October 20, 2006 I would start with the battery cables. Check for corrosion at the positive connection (including under insulation near the connection point) and proper grounding. Unless the connections are spotless you probably should clean them. I had a problem where the PCM would reset while driving due to corrosion at the positive battery connection. Link to comment Share on other sites More sharing options...
LarryMB Posted October 23, 2006 Author Report Share Posted October 23, 2006 When this problem arises the car is completely powerless. No dome lights or anything so when I attempted to get codes it did not work. Also battery connections appear to be good. Only aftermarket part on the car is a Radio the previous owner installed. Have looked at installation on it and it appears ok but also found that person had tried to bypass the parking signal to enable the DVD player to work while driving. Unhooked that since wire but this problem existed prior to that. Thanks for your help, Larry Link to comment Share on other sites More sharing options...
The Fred Posted October 23, 2006 Report Share Posted October 23, 2006 So you don't have power until starting the motor? Then the alarm goes off and you get power? MerryChristmas Be a Capitalist or work for one. Work for a Capitalist or be one. MerryChristmas Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 23, 2006 Report Share Posted October 23, 2006 Clean the battery connections especially the positive cable, take it apart by removing the red insulator. 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...
LarryMB Posted October 25, 2006 Author Report Share Posted October 25, 2006 Yes my car is completely dead until I start the vehicle. Then the alarm goes off and I have to reset that. I usually just use my Remote "unlock" function to shut it off. I have checked the battery connections and they are good and clean. I did pull off the codes this morning after starting the vehicle (wouldn't work until I did) Here is the list it gave me. PCM P0603 - Control module long term memory reset P0741 - TCC system stuck off P1632 - Theft Deterrent Fuel Disable signal recieved B1552 - Keep alive memory (KAM) error B1983 - Device power circuit low SDM U1064 - Loss of communication with DIM U1040 - Loss of Class 2 Communications with ABS U1255 - Class 2 Communication malfunction (serial Data line malfunction) B1327 - Vehicle system voltage below 9.0 Volts Was shocked there were so many but I also dont see it pointing at one general area. Any help is greatly appreciated. Thanks, Larry Link to comment Share on other sites More sharing options...
JimD Posted October 25, 2006 Report Share Posted October 25, 2006 .... B1327 - Vehicle system voltage below 9.0 Volts Was shocked there were so many but I also dont see it pointing at one general area. Any help is greatly appreciated. Thanks, Larry I would begin with a known good or new battery. Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
adallak Posted October 25, 2006 Report Share Posted October 25, 2006 Yes my car is completely dead until I start the vehicle. Then the alarm goes off and I have to reset that. I usually just use my Remote "unlock" function to shut it off. I have checked the battery connections and they are good and clean. I did pull off the codes this morning after starting the vehicle (wouldn't work until I did) Here is the list it gave me. PCM P0603 - Control module long term memory reset P0741 - TCC system stuck off P1632 - Theft Deterrent Fuel Disable signal recieved B1552 - Keep alive memory (KAM) error B1983 - Device power circuit low SDM U1064 - Loss of communication with DIM U1040 - Loss of Class 2 Communications with ABS U1255 - Class 2 Communication malfunction (serial Data line malfunction) B1327 - Vehicle system voltage below 9.0 Volts Was shocked there were so many but I also dont see it pointing at one general area. Any help is greatly appreciated. Thanks, Larry Larry, Do not worry, the more codes the better. They clearly indicate you have battery- ground- or cable-related problem. As soon as you fix the problem all the codes (or most of them) will be gone. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
JasonA Posted October 25, 2006 Report Share Posted October 25, 2006 Was shocked there were so many but I also dont see it pointing at one general area. Boy, I sure do. PCM P0603 - Control module long term memory reset <-- Likely a voltage problem. P0741 - TCC system stuck off P1632 - Theft Deterrent Fuel Disable signal recieved <-- Likely a voltage problem. B1552 - Keep alive memory (KAM) error <-- Likely a voltage problem. B1983 - Device power circuit low <-- Likely a voltage problem. SDM U1064 - Loss of communication with DIM <-- Likely a voltage problem. U1040 - Loss of Class 2 Communications with ABS <-- Likely a voltage problem. U1255 - Class 2 Communication malfunction (serial Data line malfunction) <-- Likely a voltage problem. B1327 - Vehicle system voltage below 9.0 Volts <-- Likely a voltage problem. I would certainly start with checking all battery cable connections (even on the engine/starter/ground side) and if that is good, have the battery tested by a retailer. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
winterset Posted October 25, 2006 Report Share Posted October 25, 2006 B1327 Sounds like you have either a draw on the battery from a foreign device (Radio hookup), or an internal short in the Battery. I believe low voltage is the root cause of all your other codes. When you get in the car in the morning, what does your voltage read on the dash before you start? Link to comment Share on other sites More sharing options...
WarrenJ Posted October 25, 2006 Report Share Posted October 25, 2006 I would begin with a known good or new battery. I think that is the *only* place to start. You have all the symptoms of a bad battery (low voltage) confusing your computers. Second best, as JasonA suggested, have a retailer test the battery for you. Regards, Warren There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
LarryMB Posted November 7, 2006 Author Report Share Posted November 7, 2006 Well I have checked the battery and all the connections. did find some corrosion on contacts on battery and cleaned those. Battery itself checks good. Problem still there. May have to take it to a specialist. Larry Link to comment Share on other sites More sharing options...
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