Pontiac Problems? Ask a Mechanic for Answers ASAP
Welcome! My name is ***** ***** I will do my best to assist you with this problem.
what model and engine size is this ?
and at idle what is the battery voltage reading then with the car off what is the battery volts reading with a multi meter ?
does the big power wire show 12 volts at it at the stud at the alternator ?
that should be 12 volts all the time
if that checks out good with the key ON unplug the alternator connector and see if the small red wire shows 12 volts at it also
be sure the battery cables are clean and tight and the negative at the engine and the body ground off the negative cable
if that checks out good test what i said to test
can you see if the fuse 1D is blown in the inside fuse box a 15 amp fuse ?
yes from what i am showing the computer sends the turn on power to the alternator as seen here
if that fuse is good then be sure that red wire from the alternartor to the computer is good if it is the computer is bad
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