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03-27-2012, 11:40 AM | #1 | |
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94 blazer ac blower fan control
94 blazer ac fan will work on low and med but not high replaced resistor under hood but still no high speed fan?...........thanks
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03-27-2012, 11:42 AM | #2 |
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Re: 94 blazer ac blower fan control
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03-27-2012, 12:15 PM | #3 | |
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Re: 94 blazer ac blower fan control
High speed also used a high blower relay, that may be your problem. Or could be the switch itself, or a wiring issue between the two.
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The Following User Says Thank You to gmtech1 For This Useful Post: |
NHRA (03-27-2012)
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03-27-2012, 08:11 PM | #4 | ||
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Re: 94 blazer ac blower fan control
Quote:
since you have the lower speeds the only component that is changed when you go to max blower would be the high speed relay. first find the high speed relay . then with the switch set to max blower speed see if you get voltage and ground at the relay coil #85/86 pins. if so then check for voltage at #87/30 . if the voltage is not on both these pins of the relay then the wire or fuse /circuit is open that supplies power to the relay switching contacts. as mentioned it is possible the switch at the max blower speed position is bad. I doubt it. If the fuse is blown this may mean the blower motor is in need of replacement. remove blower and see if it rotates freely . bushings not worn or debris interfering with rotation. also wires shorted . fuse should be over 20 amps. I think ! |
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NHRA (03-27-2012)
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03-28-2012, 06:49 AM | #5 | ||
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Re: 94 blazer ac blower fan control
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yeah it #87 thats burnt...cant find a new one yet............... Last edited by NHRA; 03-28-2012 at 02:31 PM. |
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04-02-2012, 07:04 AM | #6 | |
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Re: 94 blazer ac blower fan control
Where did you find the relay?
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04-02-2012, 07:30 AM | #7 | |
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Re: 94 blazer ac blower fan control
got it at autozone, had to order it took 1 day and worked like a charm<<<<<<<
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04-02-2012, 07:53 AM | #8 |
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Re: 94 blazer ac blower fan control
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04-02-2012, 08:19 AM | #9 | |
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Re: 94 blazer ac blower fan control
on mine its 94 and under the hood and its on the middle of the fire wall on a bracket one bolt holds it on
the relay has 5 wires and its about 2 1/2 in tall and like 1 in thick |
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