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Old 07-08-2006, 07:21   #1 (permalink)
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wiring a fan

The wiring to my electric fan has been compromized. well ok its screwed up and I want to wire it direct to a switch. The fan pulls quite a few amps, so how should I do this? Should I use a relay with a switch or what because I tried it without and the wires started getting a bit hot. Don't know much about auto wiring but if I am told how to do something I can do it. Just can't seem to figure out how to go about it. thanks
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Old 07-08-2006, 08:59   #2 (permalink)
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Re: wiring a fan

Yes definatley use a relay.

The power feed should be fairly heavy guage wire.

Also consider a fuse.

Cheers
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Old 07-08-2006, 16:50   #3 (permalink)
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Re: wiring a fan

Quote:
Originally Posted by grumpy44
The wiring to my electric fan has been compromized. well ok its screwed up and I want to wire it direct to a switch. The fan pulls quite a few amps, so how should I do this? Should I use a relay with a switch or what because I tried it without and the wires started getting a bit hot. Don't know much about auto wiring but if I am told how to do something I can do it. Just can't seem to figure out how to go about it. thanks
Pull an inline fused heavy wire dirct to the fan via a relay controlled by a switch in the cab.. and make sure it has a good earth .
Ohms law is your friend .
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Old 07-08-2006, 21:36   #4 (permalink)
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Re: wiring a fan

See Basics and Index of Calculators, Charts, and Diagrams for some basic 12 volt wiring knowhow and particularly here SPDT Automotive Relays regarding relays.
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Old 07-08-2006, 23:05   #5 (permalink)
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Re: wiring a fan

well, got it done. Installed a relay inline and wired it to the egnition instead of a toggle switch. works like storebought. thanks for the ideas guys.
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