heater fuse keeps blowing (773) any idea's

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tony

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Joined
Feb 14, 2008
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2
The heater and radio fuse 30 amp keeps blowing, I think when I push handles to go foward. Did I mess up the alterator when I jumped started to the battery instead of the starter? The new battery has been staying charged the last eight months. I 'll put a new fuse in it may last a few days, then I'll put a new one in and will blow as soon as I start going. Any idea's??
 

Tazza

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Dec 7, 2004
Messages
16,840
If it pops when you move the steering levers i would suspect a worn through wire shorting out. I'd put a new fuse in, lift the cab and move the lever, see where the arc comes from and repair the worn section.
 

siduramaxde

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Nov 15, 2005
Messages
362
If it pops when you move the steering levers i would suspect a worn through wire shorting out. I'd put a new fuse in, lift the cab and move the lever, see where the arc comes from and repair the worn section.
My fuse started to blow when the blower motor took a dump. But, I like Tazza's idea of looking for a short.
 

skidsteer.ca

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Jan 20, 2006
Messages
3,853
My fuse started to blow when the blower motor took a dump. But, I like Tazza's idea of looking for a short.
If you avoid running the fan on high, it will lower the amps drawn and might save the fuse. Could get you by until the weather warms up.
Do check the wire when you get a chance if moving the steering lever seems to trigger it could be worn insulation on the wire harness.
Wiring a ammeter in the heater power wire would show you if the motor is getting tired and drawing excessive amps.
Ken
 
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tony

New member
Joined
Feb 14, 2008
Messages
2
If you avoid running the fan on high, it will lower the amps drawn and might save the fuse. Could get you by until the weather warms up.
Do check the wire when you get a chance if moving the steering lever seems to trigger it could be worn insulation on the wire harness.
Wiring a ammeter in the heater power wire would show you if the motor is getting tired and drawing excessive amps.
Ken
When the cab is up I don't see any wire's exposed but when I push the left handle foreward it is touching this little back box there are some wires going into the black box I'll try and see if I can tighen up the handle so there is'nt so much slack today, I'll let you know if that works. Thanks for the imput.
 

Gazza

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Joined
Nov 27, 2007
Messages
64
When the cab is up I don't see any wire's exposed but when I push the left handle foreward it is touching this little back box there are some wires going into the black box I'll try and see if I can tighen up the handle so there is'nt so much slack today, I'll let you know if that works. Thanks for the imput.
Hi, a few years ago I had a short in the wiring loom of my truck and had to get an auto electrician to fix it. From memory this is how he found it. He had a sealed beam 12v headlight with about 2 meters of wire soldered on the back of the light to each pin, and a flat spade type adaptor on the other end. He then plugged these two spades into the fuse holder that was blowing fuses. The light was on because of the short in the loom, then he carefully wriggled every piece of loom he could find until the light flickered, then he untaped the the loom to find the short. It took about 15 minutes to find the loom had worn through the insulation where it ran across the back of the bellhousing. It looked pretty easy when you know what to do. thanks Gazza
 

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