My heater blower won't run on high speed

AFASTER69

MEMBER
1991 CHEVROLET S-10
78,000 MILES

My blower runs very slow on lower settings and not at all on high,
I have replaced blower motor and resistor thingee.

Wednesday, October 5th, 2011 AT 4:09 PM

1 Reply

JDL

MECHANIC
16,098 POSTS

Check the actual voltage reading at the blower motor, check ground also.

When hi blower relay is energized, battery voltage goes to the blower motor. No resistors for high-speed.

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My heater blower won't run on high speed

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