Fresh air fan woes, Chasing electical Gremlins |
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Fresh air fan woes, Chasing electical Gremlins |
nine9three |
Sep 21 2012, 11:44 AM
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#1
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Member Group: Members Posts: 142 Joined: 29-December 11 From: Oregon Member No.: 13,946 Region Association: Pacific Northwest |
I've done an extensive search on Fans but the questions don't really help me in my situation. First off the fan does not work. I do have power to the fan Rd/Wht wire. But here is where it gets strange. The three control setting wires Wht ones all have power at the switch (control lever). I thought these were ground wires? If they are ground, how would the power return back to the switch? (IMG:style_emoticons/default/confused24.gif)
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toolguy |
Sep 21 2012, 12:31 PM
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#2
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Senior Member Group: Members Posts: 1,268 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
You've got it right, just thinking wrong. . the blower has constant power applied from the fuses. . the switch connects one of 3 grounds back to the motor, depending on the motor speed selected. . so Yes, you will read battery, thru the motor windings, and coming into the switch on the 3 white leads. . grounding those leads is what completes the circuit. . see the brown ground strap from one of the terminals on the switch ? That needs constant good ground and is what is connected thru the switch wiper contacts and on to the white wires. .
By the way they are not all white. . one is solid white, one is white/ yel trace and one is white / green trace IIRC If you have a good ground and the motor doesn't run, I'd say your going to have to pull the blower assy and air box out. . the motor bearings freeze up from dirt and age and not being used and get hard to spin. . that will put a large electrical load on the wires and fuse. . worse case is you'll blow the fuse or melt wires/ Bad part is you have to pull the gas tank to get the air box out.. |
rhodyguy |
Sep 23 2012, 01:51 PM
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#3
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,082 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
take out the ashtray and shine a light down inside the tray hole. you'll see the contact slide fingers. prob give that area a good cleaning first esp the bottom side of the fingers. fold a fine emory paper, slide it between the fingers and run the dash side controls b&f a few times.
k |
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