Blower motor

Tiny
1BRIAN26
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I have a 1988 IROC-Z w/5.7 automatic. The high blower is not working. I have replaced the relay, resistor, and the switch in the dash! What am I missing? There is a red wire to the relay, it has 12V at all times, ignition on/off and all blower speeds, but as soon as I switch to high it goes to 0V
Tuesday, August 7th, 2007 AT 4:31 PM

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Tiny
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I believe that just leaves the blower as the problem.
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Tuesday, August 7th, 2007 AT 5:56 PM
Tiny
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Looking at the wiring diagram, I see ther is a 4 amp in-line fuse on the red wire, did you check it?
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Wednesday, August 8th, 2007 AT 10:45 AM
Tiny
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Brian,
Keep the posts on the forum Please.

I may have had the wrong diagram before, but this is what I see:


https://www.2carpros.com/forum/automotive_pictures/30961_blower_dia_1.jpg



Based on what you replaced, If the fuse is good, check the continuity of the PPL wire and the ORG wire.

This should be the fuse:


https://www.2carpros.com/forum/automotive_pictures/30961_blsw_1.jpg

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Sunday, August 12th, 2007 AT 8:12 PM
Tiny
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I spoke with a friend who said he felt that the fusible link to the blower is going bad and that it can handle the lower speeds, but when high is on it cuts out. That is why the hot at all times goes to 0 volts on high.
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Tuesday, August 14th, 2007 AT 8:11 PM

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