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Car Forum / Pontiac / Pontiac Cars / March 2007'95 Grand Prix not charging
Ok folks, this is my last resort... Over the last few weeks, my Grand Prix (3.4 DOHC) has only been charging intermittently. I have replaced the battery, serpentine belt and tensioner and I have put a reman. alternator (what a silly place to put it!) and it is not fixed, and I am running out of ideas to the problem. It seems that the alternator when it is charging gives about 13.25-13.5 volts which doesn't sound like enough, when it's not charging, well, at that point it's just a matter of time before bad things happen. My questions are... Is the voltage regulator in the alternator or a separate if separate what is the likelyhood of it being bad? Is there anything else that could be causing this at all? or am I going to be doing another alternator swap out this weekend? Are there any tests I can do to try and narrow down the problem? Any suggestions are gratefully received, I really enjoy driving this car... Anthony Normally the Starter shorting out does this type of thing or the horn. These two accessories draw the most current of anything else in a car. Do A current draw test on the starter. Most auto parts shops will do it for free. > Ok folks, this is my last resort... > [quoted text clipped - 21 lines] > > Anthony > Ok folks, this is my last resort... > [quoted text clipped - 11 lines] > Is the voltage regulator in the alternator or a separate if separate what > is the likelyhood of it being bad? It's in the alt. > Is there anything else that could be causing this at all? or am I going to > be doing another alternator swap out this weekend? > > Are there any tests I can do to try and narrow down the problem? Look for a voltage drop somewhere. The voltage you test/probe should be the same whether testing across the batt-pos, the alt-pos, the batt-neg, or alt-case, or engine block (neg). GW |
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