High current draw from the blower motor - Diff between norm and max A/C?
OK, this has become a problem again for me now that I fixed the A/C (was a bad connection at the high pressure switch on the compressor).
When idling with the air on max a/c and the blower on high - volts indicated on the meter drop way low, 10-11V. If I rev the motor the volts come back.
So whats the normal current draw for the A/C compressor clutch? And for the blower motor on high? I know the cooling fan runs non stop when A/C is on, so whats the current draw for that?
Problem doesn't happen nearly as bad on Norm or Bi-lev, or with the heater or even defroster.
It's worse with the lights on - this tells me something is either pulling about 20 amps, or possibly its time for a new battery and hi output alternator.
Whats the difference electrically between max and norm (or bi-lev) A/C? From what I can tell it only makes the blower push more air - or is there more to it?