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Old 06-29-2009, 08:06 PM   #1
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Default What fuse to use

I am going to put my fans on a switch. What size inline fuse should I use for them?? They are stockers in parallel.

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Old 06-29-2009, 10:49 PM   #2
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Specs say the draw a total of 11.5 amps, startup load is more, so 20amp should suffice. fwiw- You should use a relay in your wiring.
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Old 06-29-2009, 11:16 PM   #3
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Rather than switching them directly, why not switch the coil side of the relevant relays? This is how mine are set up- I simply have a small toggle that grounds the wire at the ECU which normally turns them on.
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Old 06-29-2009, 11:33 PM   #4
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^ Exactly.

Just put a switch between the two fan grounds at the ECU and anywhere on the chassis where the switch is.
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Old 06-30-2009, 12:00 AM   #5
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What if there isnt a stock ECU?

Thanks everyone..
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Old 06-30-2009, 11:39 AM   #6
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Quote:
Originally Posted by TURNS101 View Post
What if there isnt a stock ECU?
The wire should still be there.

In my car, I have a Megasquirt and the A/C is removed. I took the black/blue wire that used to go to pin 1J of the ECU ('92 harness) and connected it through a toggle switch to ground. When I turn on this switch, the A/C relay closes and both fans turn on. This wire is also connected to the Megasquirt, so the MS can turn the fans on if I'm not paying attention.
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Old 06-30-2009, 01:59 PM   #7
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The wire for the thermoswitch is what you're looking for. That would be the lead to send to ground via your new switch.
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