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Electrical Discuss anything related to OEM & aftermarket electrical devices including: stereos, speakers, video, batteries, starters, the body control module, lighting, etc.

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Old 12-10-2009, 08:34 AM   #1 (permalink)
jstroke
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No high speed on blower

Lost high speed on blower motor. Replaced resistor and does the same thing. I can feel a click at the resistor when I go from speed 4 to 5 and the fan quits completely. Am I looking at a blower motor, or a switch?? Thanks.
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Old 12-10-2009, 10:30 AM   #2 (permalink)
Jake
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I know the older trucks used a separate relay for the blower high speed mode. This bypasses the resistor circuit entirely. You may want to check for this relay.

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Old 12-10-2009, 12:57 PM   #3 (permalink)
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Quote:
Originally Posted by jstroke View Post
Lost high speed on blower motor. Replaced resistor and does the same thing. I can feel a click at the resistor when I go from speed 4 to 5 and the fan quits completely. Am I looking at a blower motor, or a switch?? Thanks.
you should have a fuse under the hood just for the high speed.
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Old 12-15-2009, 12:48 AM   #4 (permalink)
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mine also does this but its weird, its been extremely cold here the past week and i start it up and the blower no work on high, but after its warm i can switch it to 5 and it works great, any ideas there.
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Old 12-15-2009, 01:43 AM   #5 (permalink)
heymccall
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To the OP, underhood BLWR fuse 40amp, IIRC.
The the last guy, bad relay on the resistor module, or melted plug or both.
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Old 12-15-2009, 12:56 PM   #6 (permalink)
paintplayer3
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Im taking my truck in to have that looked at Tomorrow. What would cause the fuse to blow? isnt that going to be an on going problem if it happened once?
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Old 01-27-2010, 08:14 AM   #7 (permalink)
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Finally found problem. bad connection in the female plug to the resistor. No major signs of melting but it was not making good connection. Replaced connector and all is good. Except the wallet. $97 for new connector and female pins!!!
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Old 01-27-2010, 10:10 AM   #8 (permalink)
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Quote:
Originally Posted by jstroke View Post
Finally found problem. bad connection in the female plug to the resistor. No major signs of melting but it was not making good connection. Replaced connector and all is good. Except the wallet. $97 for new connector and female pins!!!

I was just about to say that

Very common problem on these trucks.
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Old 01-27-2010, 10:16 AM   #9 (permalink)
heymccall
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Greg sells that plug (with pigtail wires) for some ungodly stupid amount.
http://lubricationspecialist.com/fro...0&productid=71

Sometimes it pays to ask
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Old 01-27-2010, 01:21 PM   #10 (permalink)
jstroke
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Well. I guess that is an $85 lesson learned. Thanks for the tip though.
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