Electrical nightmare

10

Asked by shvac99 Feb 19, 2016 at 09:47 AM about the 1997 Mitsubishi Galant ES

Question type: General

Replaced alternator and battery getting 12v
while running is there any other component
that could cause this

4 Answers

220,505

12 volts is low on battery voltage, charged should be at 12.5 V. Like I said when charging voltage should read 14.5 V at the battery. Unless you have some sort of wiring problem, bad connections, burnt wiring, there is usually a problem with the alternator. But since you have replaced it on lots of vehicles there is a fuse that could be blown not allowing the alternator to work. Start by looking for a burnt out fuse. Could have ben caused by the old alternator.

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10

Thank you for the great info.I just tightened the belt more on the alternator and the light doesn't come on anymore feel a little foolish still not getting 14.5 at battery only 13

220,505

How did you tighten the belt? It looks to be a serpentine belt that would have a belt tensioner on it. Sounds like the belt was slipping and the only way to stop that is to get a new belt and maybe the belt tensioner.

10

On the alternator theres actually a slide bracket with a tensioner screw on it. The alt belt also runs the power steering pump. It took a little time to figure out why the alt light was affected by turning the wheel. The car was sitting for a couple of years and i was worried rodents might have damaged something. Because the belt wasnt tight enough it wasnt charging properly. And affecting p.s and alt light. Charging 14.5 now. Thanx for helping

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