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Old Jan 17, 2007 | 11:24 AM
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From: Capac MI
Block heater please help

Hey guys, Im at school rite now working on my powestroke. Heres my question and im in need for a speedy answer. For some reason when i plug in my block heater it blows the circuits in my house. Now two of my outlets wont work. Im not sure if this is from my block heater or not. So this morning i didnt plug it in. Big mistake it was 9 degrees and it didnt want to start. So now im at school, I put an ohm meter on there and measured the resistance and i do have resistance. What could be the problem, If there is any at all. Thanks
 
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Old Jan 17, 2007 | 11:32 AM
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Check to see if your wiring is shorted anywhere on the truck.
 
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Old Jan 17, 2007 | 11:42 AM
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Look at the end of the plug, it may be shorted out like mine was.
 
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Old Jan 17, 2007 | 11:46 AM
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I went with an ohm meter and im only getting 18 ohms. Its shorted out. Now how much is this going to run me for a new heater.
 
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Old Jan 17, 2007 | 11:59 AM
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are you checking from the plug, or from the element itself?
 
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Old Jan 17, 2007 | 12:00 PM
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May only need to replace the cord itself, or even better, splice in ahead of where the short is like others have done in the same situation.
 
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Old Jan 17, 2007 | 12:13 PM
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I checked across the prongs, Where else should i check??
 
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Old Jan 17, 2007 | 12:29 PM
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Probably have to trace the wiring back all the way until you find it. Mine is in one of those black wire wraps, which means that yours probably is too. I guess you'll just have to start pulling the wire out of the wrap until you find it. I would focus first on locations where there is a high potential for rubbing/pinching. Others may have better ideas.
 
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Old Jan 17, 2007 | 12:53 PM
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I can check that with a Test light?? Also im on alldata and there is a service bulletin about the glow plug relays. How can i check to make sure if thats ok??
 
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Old Jan 17, 2007 | 12:59 PM
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Visual inspection for obviously broken/cracked/worn insulation.

I can't really help with the GPR issue.
 
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Old Jan 17, 2007 | 01:00 PM
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If you search for GPR threads, I'm sure that someone has probably posted a checkout procedure somewhere.
 
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Old Jan 17, 2007 | 01:04 PM
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This thread might be helpful.

https://www.ford-trucks.com/forums/4...ke-thread.html
 
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Old Jan 17, 2007 | 01:50 PM
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Originally Posted by THE KING
I can check that with a Test light?? Also im on alldata and there is a service bulletin about the glow plug relays. How can i check to make sure if thats ok??
Your Glow plug system will have nothing to do with your block heater pushing breakers...however, there is an easy way to test to see if your relay is working.

Your relay is just like a starter relay. It's located on the passenger's side of the motor close to the fuel filter, just above the valve cover. There are two large posts. One has constant power, and the other post only when the key is turned over into the ON position. You should be able to test this with a multimeter. hook the clip to the neg. terminal on the battery, and check for voltage at the two big terminals. When the key is turned on, you should have voltage at both terminals. If not, your GPR is bad.

You can also jump the two large terminals with a screwdriver while turning over. If this works, GPR is bad. This can cause some sparking and burning, though.
 
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Old Jan 17, 2007 | 01:55 PM
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Originally Posted by THE KING
For some reason when i plug in my block heater it blows the circuits in my house. Now two of my outlets wont work. Im not sure if this is from my block heater or not.
Any chance it's wet there, or snowing? Water is a natural electrical conductor, and if your male or female ends got wet, it would cause those breakers to blow. Any sparking, or anything else strange?

What does your cord look like? Any obvious wear like these guys are saying? a bad ground somewhere might cause this type of problem.
 
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Old Jan 17, 2007 | 02:02 PM
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Another option

Just a hopefully simple solution. I had trouble with my block heater not being on in the morning, came to find out that my freezer was off and the GFI (Ground Fault Interupt) was tripped. Had a freezer, the truck, and christmas lights plugged into the same circuit, causing it to trip. Might check and see how much stuff you are running on that circuit. After I got rid of the christmas lights, mine worked great even when plugged into the same outlet as the freezer (big 21 cubic foot).
 
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