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 Radiator fan cycling on/off

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TBOMB



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PostSubject: Radiator fan cycling on/off   Wed Jun 26, 2013 9:06 am

The radiator fan kicked on as usual at around 165 degrees, but ran for about 20 seconds and then off for about 20 seconds. This continued and the temp. continued to rise. The fan worked constantly when connected directly to the battery.  I located the circuit breaker in the harness and unplugged it and temporarily installed an inline fuse to check operation. Everything worked as it should so I made the inline fuse work by cutting plugs off of circuit breaker and soldering them onto the fuse. I used a 10 amp fuse. Also, I checked the current draw while the fan was running and at startup it was close to 6 amps and stayed at about 5.5 while running.
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PostSubject: Re: Radiator fan cycling on/off   Wed Jun 26, 2013 9:49 am

glad you got it fixed!

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PostSubject: Re: Radiator fan cycling on/off   Wed Jun 26, 2013 9:53 am

Good find TBOMB ! I had the same problem and replaced that thermal breaker with a circuit breaker. Haven't had a problem sense !

I think part of the problem is that they stuff that thermal breaker down in the wiring harness in the battery box. Gets way too hot.

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PostSubject: Re: Radiator fan cycling on/off   Wed Jun 26, 2013 9:56 am

Good Job, Clean work.

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PostSubject: Re: Radiator fan cycling on/off   Wed Jun 26, 2013 11:56 am

Firefighter wrote:
Good find TBOMB ! I had the same problem and replaced that thermal breaker with a circuit breaker. Haven't had a problem sense !

I think part of the problem is that they stuff that thermal breaker down in the wiring harness in the battery box. Gets way too hot.

I think you have hit the nail on the head, regarding bundling the thermal breaker in a blanket! That thermal breaker has been a fairly common problem over the years.

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PostSubject: Re: Radiator fan cycling on/off   Thu Jun 27, 2013 6:51 pm

guess I need to do this as well.. min runs and goes off runs and goes off... I also need a new fan cause mine sounds gritty like its got sand in it

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TBOMB



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PostSubject: Re: Radiator fan cycling on/off   Thu Jun 27, 2013 7:59 pm

I'm not sure where the circuit breaker is located on your 06, but on my 05 it was in the wiring harness very close to the steering column. I know other guys have mentioned theirs was in the battery box. Hope that helps!!
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PostSubject: Re: Radiator fan cycling on/off   Thu Jun 27, 2013 8:07 pm

Bumpers wrote:
guess I need to do this as well.. min runs and goes off runs and goes off... I also need a new fan cause mine sounds gritty like its got sand in it
I seem to recall a thread or three mentioning disassembly of the fan motor to get to the bearings and brushes. It might be worth the effort to clean it up inside and oil the bearings?

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PostSubject: Re: Radiator fan cycling on/off   Thu Jun 27, 2013 9:53 pm

Might be worth a shot.. but my luck I should have a new one ready to go cause I tend to break anything with small parts when I take it apart haha

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PostSubject: Re: Radiator fan cycling on/off   Thu Jun 27, 2013 10:19 pm

Bumpers wrote:
Might be worth a shot.. but my luck I should have a new one ready to go cause I tend to break anything with small parts when I take it apart haha
Me too, then I see how it was supposed to be taken apart. Crazy glue fixes all sorts of busted stuff! HaHa.

A link that might be of some interest, also do a search yourself with whatever words you think might lead you to the Pot'oGold.... cyclops
http://hotrodrhinoforums.forumotion.com/t533-radiator-fan?highlight=radiator+fan+motor#6037

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