Question about 1992 Cadillac DeVille

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Wont start I have a 1992 Cadillac deville and its has trouble starting and it has already been in the shop for making noises and having trouble running, its like it would just "pudder" along and kinda skip a little. But its has cranked a couple of times and i tried it yesterday and it wouldn't start, no lights come on, it was pretty much dead, and yes we have charged the battery.

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Let's start with the basics. The fact that no lights come on indicates that the battery is not making a good connection. The positive cable at the battery has an unusual "double layer" connection and sometimes white corrosion can build up in there. Use a wire brush or emery cloth and scrub out any rust, corrosion, etc and spray with WD40.
Even a small amount of corrosion can cause a battery to malfunction.
Check the ground cable also and make sure connections are not loose anywhere.
Once you've made sure the battery is good, and the positive and negative cable connections are clean and good, try to start the car with the headlights on. Have someone watch the headlights when you turn the key.
If the headlights nearly go dead, your battery is weak. If the headlights don't flicker at all, you have a bad battery connection somewhere because there is no draw from the starter. If your headlights dim somewhat and you hear a clicking, or the car barely cranks, or nothing else happens, the starter or solenoid may be at fault. I really can't go beyond this point until you make sure the battery is strong and has good, clean tight connections. Try a known good side-post battery out of another car if you have doubts about your own. Hope this helps.

Posted on Feb 03, 2009

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