 relay under dash never stops cycling |
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| jdlmodelt |
 Mar 10 2013, 04:31 PM
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#1
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James D. Lane  Group: Members Posts: 345 Joined: 30-November 12 From: Colorado Member No.: 15,210 Region Association: Southwest Region  |
So, a new bad thing has started. There is a relay under the dash that starts cycling when I turn on the ignition key and continues cycling even after I start the engine. I drive it 27 miles one way to work and I can still hear it. It's quiet but its there. It hasn't been doing it all along. I listen for noises. I pulled the two round relays from the back of the fuse panel in the cab and I still hear it. I think the only relay left is the signal light relay. Its not the headlight relay. So, anyone know what this is and how to fix it?
(IMG:style_emoticons/default/sad.gif) |
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| r3dplanet |
Mar 10 2013, 05:32 PM
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#2
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Senior Member Group: Members Posts: 679 Joined: 3-September 05 From: Portland, Oregon Member No.: 4,741 Region Association: None |
Well, there are five relays down there. I would disconnect the negative battery cable and pull down the fuse block so you can more easily access the relays, which mount above the fuses. There's a major ground point right where the fuse block meets the body on the driver's side and it can zap in a fearsome way when you pull the fuse block unless the ground is disconnected. Once free, make sure the grounds are clear and reconnect the battery. You should then easily be able to pull the other relays and test the following:
fog lights horn fresh air fan It sounds like you've already managed to test the blinker/hazard relay and headlight flasher. I did this a year ago when upgrading to a better fuseblock. I took the time to label the relays. They mount to the fuse block with small rubber nubs, and they can be attached in just about any order as long the wires provide enough slack. Mine were in a different order than what the manual showed. Labels are our friends for times like this. Try this and let us know? -marcus |
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| Dave_Darling |
Mar 10 2013, 06:09 PM
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#3
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914 Idiot Group: Members Posts: 14,985 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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It's the turn signal relay. Double-check your handbrake lever switch and the warning switch in the master cylinder. Then start checking the connections in the turn signal and hazard light circuits.
Look for dirty or blown fuses, and clean your grounds. Chasing electrical problems can be so much "fun"... --DD |
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| jdlmodelt |
Mar 11 2013, 10:30 AM
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#4
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James D. Lane Group: Members Posts: 345 Joined: 30-November 12 From: Colorado Member No.: 15,210 Region Association: Southwest Region |
Thanks! I'll look into all the recommendations.
j |
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