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1997 Isuzu Rodeo Question Heater blower doesn't work

Tiny
RMKRIDER1
  • MEMBER
  • 1997 ISUZU RODEO
  • 6 CYL
  • 4WD
  • MANUAL
  • 113,000 MILES
I can't get the blower in my '97 rodeo to work. I pulled the blower out and hooked to a battery and it works fine. So I'm obviously not getting power to the motor. I checked the fuse and it's good I switched the relay with another that "looked" the same and still nothing. I then pulled the dash apart and unhooked the plug from the fan switch and tested the wires and found no power with the key being on or off? Any Ideas where I could be losing the power? There's power to the fuse and power to 1 of the 4 terminals on the relay does that sound right?
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Sunday, February 8th, 2009 AT 4:09 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the ground side of the AC/heater relay the relay has to ground out before power is transfered to the blower motor


https://www.2carpros.com/forum/automotive_pictures/12900_blower_relay_6.jpg

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Sunday, February 8th, 2009 AT 4:23 PM
Tiny
RMKRIDER1
  • MEMBER
  • 3 POSTS
I checked the heater relay and 2 of the 4 terminals are grounded with ignition off. With the ignition on none are grounded and 1 has 12v
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Sunday, February 8th, 2009 AT 5:19 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Ground one side of the coil relay and see if it powers up
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Monday, February 9th, 2009 AT 12:16 PM
Tiny
RMKRIDER1
  • MEMBER
  • 3 POSTS
The problem was the resistor block located right behind the glove box and mounted right in the fan housing.
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Monday, February 9th, 2009 AT 8:49 PM

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