HEATER INOP 1988 CHEVROLET PICKUP

  • Tiny
  • skiase
  • 1988 GMC

Question for a 1988 Chevrolet 1/2 Pickup w/ AC.
25 Amp Heater Fuse blew today while selecting blower from high speed to low speed, Electronic Display/Control Panel will not illuminate/Inop. Replaced fuse blew instantly, Disconnected blower and A/c compressor and 25 Amp Fuse still blows.
Looking for possible componets which may be at fault.I would like to know location of blower relays and resistor. Any Help is appreciated.

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Saturday, February 11th, 2006 AT 10:08 PM

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  • Tiny
  • skiase
  • Member

Problem Solved !
FYI
I found the relays and the resistor behind the glove box.
After disconnecting all the components to verify none of them at fault, I started checking the wiring. I found that several wires were shorted to ground in the main harness, behind the cassette deck bracket. There actually 6 wires chafed into the core of the wires and 2 pinched and shorted to ground.

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Sunday, February 12th, 2006 AT 3:10 PM

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