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Grounding Issues

Grounding Issues

Postby mightymite89 [OP] » Sep 02 2012, 12:18am

Hey Guys

I've been having issues with my rad fans running when the truck is off, and subsequently draining the battery. Magically, it happens when it's humid outside or when it's been washed. After searching for exposed grounds, I found the two wires that ground under the right front bumper were exposed after they burned through and shorting on a metal edge. I've been pulling a cooling fan fuse under the hood when the truck is parked to save the battery. What I'm looking for is if anyone knows exactly what is grounded through this location (I believe it's ground G115). Does anyone have a list or schematic that includes this location? I'd like to know what exactly runs through these circuits before I have them replaced, just to get a good 'before and after' idea in case it doesn't fix the issue. I've also replaced the Coolant Temp Sensor and drained/replaced all the old rad fluid. My right fog light is also not getting power to the socket, and although it appears to have been a replacement socket at one point, I don't see any breaks or exposed wiring with it. Any help would be fantastic.
Cheers

2006 GMC Sierra 1500 5.3 4X4 crewcab.
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Re: Grounding Issues

Postby ASTE25 » Sep 03 2012, 4:51am

Have you checked the sensor that controls the fans?
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Re: Grounding Issues

Postby mightymite89 [OP] » Sep 03 2012, 5:43am

Which one are you referring to? I have replaced coolant temp one, as well as all fan relays and fuses under the hood.
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Re: Grounding Issues

Postby ASTE25 » Sep 03 2012, 7:43am

I was meaning the one that starts the fan by the coolant temperature.
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Re: Grounding Issues

Postby mightymite89 [OP] » Sep 03 2012, 9:34am

Unless there's more than one, then yes it's been changed. I changed the Coolant Temp Sensor, located on the driver side bank of the engine, just above the front-most spark plug. Is this the one you're referring to?
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Re: Grounding Issues

Postby ASTE25 » Sep 03 2012, 10:38am

I'm not really sure. I'm thinking there are two different coolant sensors. One for the gauge and one for the cooling fan. I'd have to see a wiring diagram to be sure. Sorry I can not tell you a definate answer.
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Re: Grounding Issues

Postby mightymite89 [OP] » Sep 03 2012, 1:45pm

Yeah I'm hoping to get my hands on a wiring schematic that has that information. No luck so far though.
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Grounding Issues

Postby Machster69 » Sep 03 2012, 2:37pm

Have you checked gmupfitter? They have diagrams for some... Also its about time for a good service manual for your truck. It will definitely have all schematics...
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