Question about 1992 Ford Mustang
I have replaced both the battery and the alternator twice, as well as the alternator plug. I have also checked both battery cables and replaced the negative terminal. I have checked the fuses. It starts right up, as long as the battery is new, or fully re-charged. With the new battery in place, the very first time I start it, it still only reads app. 9.5-10 volts. I can drive it that way, but it obviously doesn't last long as the voltage continues to drain off. Somewhere it is not charging, but where does an extreme novice start to look?
Try the ignition switch. my thunderbird had the same problem.with it runing it was only charging at 11 volts.just look under 1991 thunderbird not charging or go to autozone.com.it will tell you how to test it with a dmm or test light. dmm=digital multi meter.
Posted on Dec 11, 2008
When you start the car does your stater ound like it is dragging ( slow turning )?,I would remove the starter and bench test it to see if it is dragging or operating properly. if you are not sure on doing this yourself look in the phone book for a shop that specializesin starters and altenators as they will usually test them for free, hoping to get your buisness and they can test it rite in the car without removeing it. I am thinking that your starter solonoid is shorting out and drawing your power. I am also wondering if your altenator belt is tight enough. also you mentioned that you checked and replaced one of your battery cables. was this because it was corroded inside ( under the insulation )?
good luck and I hope that this helps you, and remember to rate all the solutions that are posted to you.
Posted on Oct 18, 2008
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