Urgent please help

Asked by GuruHDJ84 Jul 02, 2019 at 12:29 PM about the 2004 Pontiac Grand Prix

Question type: Maintenance & Repair

I have a 2004 Pontiac grand prix non super
charged I'm getting a charging system
failure light on the middle cluster this
started three months ago I had the
alternator replaced also replaced the
serpentine belt and had the battery cables
replaced as well with a new battery now it's
showing up again I noticed it when I was
driving with the a/c on radio playing and I
went to let the driver sie window down and it
appeared please help if you can.

1 Answer

40

There i a small factory wire at the back of the alternator that sends a signal to the cluster any aftermarket alternator will trip this sensor randomly if you are ever unsure check the battery with a multi meter turn the meter to dc voltage while the car is running at idle touch the black wire from the multimeter on negative terminal red wire on positive it shoul read around 14v maybe a little more if so your alternator is good

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