Mechanics

PONTIAC GRAND AM FUSE PROBLEM

2004 Pontiac Grand Am • 194,000 miles

Does the PCM supply 12 volts to the fan relays? I don`t have voltage at the fan motors, at 220 degrees.


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Guest
January 2, 2013.



The pcm controls ground for the relays, not voltage. Did you check for voltage at the relays? There are fan fuses in the under hood fuse block. Will the fans run if you turn on the ac? If you unplug the coolant temp sensor will the fans run? Any applicable trouble codes?

JDL
Jan 2, 2013.
Just to add, low speed fans come on around 223 degrees F. The high speed around 230 degrees F.

JDL
Jan 2, 2013.