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Cadillac DTS Electrical Issues

66 messages,  Last post on Oct 19, 2009 at 12:04 PM

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#62 of 66 Re: 2006 DTS will not start [conked] by usabravo Sep 11, 2009 (11:18 am)
Replying to: conked (Sep 10, 2009 7:07 am) Dealer claims this is not the problem and that General Motors tech. is now saying it is somehow tied into the Onstar module. They are going to disconnect the module and want me to drive the vehicle, and if it corrects the problem they will replace the Onstar module. If not it is back to the drawing board. The problem is, as you know, if the vehicle does not start it must be towed each and every time--a jump does absolutely nothing as the battery is in great shape! Replies to this message: conked (Sep 11, 2009 11:45 am)
#63 of 66 Re: 2006 DTS will not start [usabravo] by conked Sep 11, 2009 (11:45 am)
Replying to: usabravo (Sep 11, 2009 11:18 am) I suppose the dealer sometimes knows what might cause a problem because they are exposed to more vehicles than just the one that you (or I) drive. My dealer re-programmed the remote key entry system and did something with the OnStar module attempting to find my problem, but these "fixes" didn't solve the problem. I would think that if a module was malfunctioning it would drain the battery, but that was never the case--like you, the battery would magically come back to life at full charge. At one time I thought perhaps the battery had a cracked intercell connector. I'm still not sure this wasn't part of the problem. The other symptom I had that you might check: my battery charging voltage, as indicated on the Driver Info Center under the speedo, would constantly vary. Sometimes it would charge at as much as 15.9 volts, other times only 12.3 and it was never constant...always moving around up and down. After the ground cable fix, it was steady as a rock at 13.8, just like every other car I've ever owned. A friend of mine who works at a local Buick dealership said they've had some similar problems with Lucernes.
#64 of 66 Hello All, by sharon26 Sep 12, 2009 (12:53 pm)
Thank you for your many emails re: problems with the caddy DTS. After six trips to the most unhelpful dealer (Coleman Cadillac, Bethesda, MD) where they blamed it on Onstar and finally on my Mother, she went to a lawyer. He sent a letter to GM and their customer dis-service person contacted my mother via phone and email and basically said it was her fault. No wonder they went bankrupt!   Through the lawyer, Mom found an excellent independent mechanic, Gili's Automotive, Rockville, MD. Gil did a complete diagnostic workup, including checking out the Onstar program. He said there were "several" computer updates from the manufacturer that had not been downloaded by the dealer. There were also some problems with the electrical system not being grounded correctly. Needless to say, Gili's fixed the problem - she has not had any problems since. She also takes the car to Gili's for regular maintenance as the cadillac dealer is totally unreliable.        Sharon26
#65 of 66 2003 DTS Roadlights not working by effee Oct 12, 2009 (2:47 pm)
I noticed recently that the lights inset in the front bumper do not come on when the headlights are turned on. Is there something you have to do to turn them on or is it an electrical failure? Thanks in dvance if anyone can help.
#66 of 66 Electrical problem solved Cad. 2006 DTS by usabravo Oct 19, 2009 (12:04 pm)
Previously posted messages no crank/no start. Dealership and GM believed the problem to be a module. I kept telling them it sounds like a grounding issue. Eventually, the electrical would die completely while driving and then 10 seconds later electrical would come back on. No speedometer, no power windows, no power locks, no gas guage reading, etc. Display would flash all kinds of crazy messages.   Apprently they listened and looked harder and found under the steering wheel lower dash a wire had its insulation rubbed through and was grounding. Apparently the wires are not routed correctly causing rubbing. Apparently Cadillac DTS 2006 has had prior problems with this (they found out from GM after mine was disagnosed) however there is no TSB at this point. Apparently there should be at this point.   They fixed the problem and now I am happy. I was losing my mind with the intermittent problem. Good luck with your problem.

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