richwill
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| posted on 7/1/09 at 03:26 PM |
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wiring the electric fan
I have what i believe is a micra radiator which has a switch built in for the fan to operate. I am not sure of the correct way to connect the wiring.
Help please.
Cheers Rich
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tegwin
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| posted on 7/1/09 at 03:32 PM |
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Ground one side of the switch on the rad...
The other side needs to go to one side of the coil on a relay.... Other side of the coil goes to +ve battery
Then simply put a +ve supply onto the switched contact on the relay, runa wire from the other contact on relay to the motor... and earth the motor...
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Mr Whippy
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| posted on 7/1/09 at 03:36 PM |
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watch your fingers, quite a lot of power in fans
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Xtreme Kermit
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| posted on 7/1/09 at 04:22 PM |
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and don't forget to fuse the power run to the fan... 
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David Jenkins
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| posted on 7/1/09 at 04:24 PM |
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And consider whether to wire the fan's +ve supply from the switched or unswitched feed.
I chose to connect to the unswitched (always live) feed, as I wanted the fan to help cool the engine down after I've stopped the engine.
There are arguments for each option...
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