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Author Topic: Blower Fan not working  (Read 59818 times)

Offline VileZambonie

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Re: Blower Fan not working
« Reply #15 on: July 02, 2010, 04:42:01 am »
Please answer this question:

Do you have B+ at the purple wire coming out of the relay when the key is on and the switch is on high?
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Offline induction

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Re: Blower Fan not working
« Reply #16 on: July 02, 2010, 07:49:26 pm »
Nope, don't have B+ at the purple wire coming out of the relay when ignition on, and switch (vent) on high.
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Offline VileZambonie

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Re: Blower Fan not working
« Reply #17 on: July 02, 2010, 08:39:55 pm »
And what do you have at the orange wire at the relay?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline induction

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Re: Blower Fan not working
« Reply #18 on: July 03, 2010, 03:35:30 pm »
For the orange wire at the connector for the relay, I have nothing when ignition is on, vent on High or with vent off).

This is the same for any of the other 5 wires except for red.
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Offline VileZambonie

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Re: Blower Fan not working
« Reply #19 on: July 04, 2010, 10:19:51 am »
At the orange wire at the relay, backprobe it with the key on blower on high, jumper it to ground momentarily and let us know what happens.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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