I replaced the heater core in my truck klast.

Tiny
ANONYMOUS
  • 1994 GMC SONOMA
  • 250,000 MILES

I replaced the heater core in my truck klast year and this year the blower motor and fan quit on me so I replaced them both my switch is still working but no I have no fan. It worked for about half an hour when I first installed it then quit. What could be the issue? I've got power everywhere I was looking for a wiring diagram from the blower motor

Tuesday, December 11th, 2012 AT 10:48 AM

1 Reply

Tiny
HMAC300
  • EXPERT
  • 48,721 POSTS

There is a resistor and relay by the blower check to see if power is going in and out there. There is also a fusible link that could have burned out it supplies power to relay

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Tuesday, December 11th, 2012 AT 2:48 PM

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