Loss electrical power
My 1990 f150 has an electrical issue that I need
help with. When I turn on the ac it pulls the
electrical power on the amp gauge down to I'd say
less then 10 amps and if I come idle at a traffic
light it goes down even further. If I leave the ac on
and at idle it will drain the power all the way down
until it shuts off.
It could be your alternator
If it only does it when u turn ac on, u have a short in the system or a bad ac compressor. Disconnect the olug at the ac compressor and turn ac on, if it still does it, u have a shor in the ac circuit but if it doesn't do it, replace ac compressor
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