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Cadillac Repair/1990 DeVille Insterment Panel
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Question
QUESTION: My girlfriends dad has a 90 DeVille and has had some dash and interior lighting problems. I told him to bring it over and I can see what I could do for him as to find the problem. Here is the story...
Speedo Works
No fuel tank reading
all other info on dash reads 8's
Climate control does its own thing apparently
and for the first 30 seconds or so he says that the 'reading' lights in the car flash a certain amount of times about three times but stops once you start to drive it.
He already reset the computer apparently..
Thank you.
ANSWER: Hello,
There is a good chance it has a bad ecm or cluster. Reading 8s is not good.
Why did he reset the computer? Because of the 8s or something else?
Generally, if the cluster is lighting up 8's it goes back to the cluster or computer because this shows the cluster is powered up.
I don't any longer have diagnostics for a 20 year old car.
If you want to get all manuals on the car you can go to http://www.alldata.com, pay about $25 to be a member and dowload all the info for a year.
When I need answers for diagnoses of a specific vehicle, this is where I go.
---------- FOLLOW-UP ----------
QUESTION: Okay finally talked to him and got some more info that I want to get your take on.
When starting the car the reader lamps (The ones above your head) blink 50 times for three sets. So 150 all together and it is always 50, that leads me to think that it is the ECM. What do you think?
Hello,
As I stated before this car is about 15 years too old for me to have any diagnostic information on. If I. Had the information I would gladly share it the car is simply too old and I don"t know of techs that have this information.
Guessing on these will get you replacing parts it does not need with extensive labor, sometimes for nothing.
I gave you the site I would go to if it were my car.
Everything you need is there and the price is cheap.
I cannot agree with you that it is a ecm problem because I am not at the car with the schematics and the diagnostic flow charts from all data.
I am sorry, but Ican't help you because of those reasons.
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Rob Painter
Expertise
Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?
Experience
Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.
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