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#1
09-05-2008, 12:00 PM
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A strange blower fan problem 1997 blazer
Everything was fine and then all of a sudden the blower fan just quit. I connected the fan motor straight to a battery and it runs ,and there is 12 v at the harness but it wont run. I replaced the resistor pack and it wont run. I
 dont understand why it wont run if there is 12v at the harness ,and I did check to make sure there is a good ground. Any suggestions are greatly appreciated!
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#2
09-05-2008, 12:58 PM
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Re: A strange blower fan problem 1997 blazer
Ahhh- You are probably checking for voltage at the connector WITHOUT the blower plugged in....Try checking it WITH the blower plugged in and you'll see 0 volts-- what is happening is you have a bad or weak (or overheated, smoked, burnt, etc) connection somewhere that will show voltage but not pull any amps through it-- so I highly suspect the switch feed wire, or the plug at the resistor or the blower plug itself.
It is a little harder to check with blower pluged in- but with staright pins (or I prefer hat pins) inserted in the back side of the connector you can do it.
__________________
Automotive A/C Engineer with: '99 IH 4700 Toy Hauler (2) '95 GEO Prizms both maroon '99 GMC Yukon '95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller. '94 Astro- 370k miles '94 Firebird Formula- 5.7L 180k miles- gone- '92 Chevy Lumina Van 3.8L 264k '86 GMC S-15 - 2.8L 154k '87 Buick Park Ave . 187k '86 Buick Park Ave 3.8L 199k miles- gone '77 Chevy Vega- 2.5L 175k miles gone but not forgotten '68 Camaro 396 4 spd RS/SS -72k miles-
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