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The blower motor doesn't work in my 94 Isuzu Pickup

Tiny
ISUZU26
  • MEMBER
  • 1994 ISUZU TRUCK
  • 6 CYL
  • 4WD
  • MANUAL
  • 260,000 MILES
I can't get the blower motor to work in my truck. The voltage reads 14 volts and the motor has continuity. I even tried buying a new motor but it still doesn't work. I've checked the relay, oil pressure, switch, and on/off switch for the motor and they all check out. What should I do next?
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Saturday, June 18th, 2011 AT 9:24 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The oil pressrue switch has nothing to do with the AC/Heater motor-Check and test the following AC/Heater fuse, blower relay, blower resistor and blower switch-Try powering the blower motor direct from the battery and see what happens
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Saturday, June 18th, 2011 AT 9:37 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Attached is a schematic of the heater circuit.

If grounding the Blue/Black with connectors plugged in runs the motor, check the ground circuit connections at right kick panel. Try grounding the Red/Blue wire from the resistor. If motor does not run, the resistor is bad.
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Sunday, June 19th, 2011 AT 9:53 AM

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