Question about 1999 Ford F150 Regular Cab

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Charging system alt does not chareg in truck. Bench tested O.K.

Charging system issue on 1999 F-150 4.2l

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What makes you think the truck isn't getting power? What obsevation. Have you measured the output on the back of the alternator?

Posted on Dec 01, 2011

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Measure the voltage at the big wire on the altenator engine off, do you have power? Check in your distribution box under hood, find the two rows of fuses located inside the box on the outer edge, look at the outside row from front to rear the 4th fuse (# 11/ 20 AMP fuse), is for the altenator field, make sure this fuse is not blown, if it is good and you have battery power on the big wire at the altenator, then replace the altenator. Hope this helps, let me know.

Posted on Dec 11, 2009

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