Re: 91 Topaz Problems
I had an identical problem mine turned out to be a bad cell in the battery. These can give you fits. When you take it in to auto zone or advance auto or another parts house to get it tested it will show that it is good, then once you run it for a while and the battery gets warm it will not hold a charge. A quick way to isolate it is to start the car and while it is running remove the positive battery cable. If the vehicle stays running the alternator is good, if it quits the alternator or wiring is bad. A word of warning, this test can be hard on the computer, so don't run it more than a couple of times.