Electric fan rewire question. Mostly

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Axoure Dragonkin
Posts: 194
Joined: Sat Sep 11, 2004 9:46 am
Car: '92 Nissan 240sx se

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Here is the situation: I rewired the electric fan to run from a switch. Bought a switch that lights up when it is on. Only used 2 of the switches connections so the switches light does not work. Thought everthing was fine and dandy, fan turned on and off fine. Woke up this morning to a dead battery. Had to go to work so I jumed car and unplugged the leads on the switch. After work, had a slow start, like battery drain again.

What i did was ran wire strait from red battery terminal to blue wire on fan, then black wire on fan to switch, then switch to ground.

Switch rated at 30 amps bought at Radio Shack. Three plugs named ground, load, and power. I know I need the ground plugged in and either load or power. Do I need to plug both in? In that case, what should the third be pluged into?

Or.

Did i just screw up the wiring? Like, say, put the switch between the red battery terminal and fan instead.

Or.

Should I wire one of the tons of automotive relays I have lying around. As in this diagram.http://www.nicoclub.com/zerothread?id=62412


User avatar
corn322
Posts: 1572
Joined: Tue Apr 22, 2003 10:11 am
Car: 1993 240sx
Location: Austin, TX

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on the switch, you would plug the fan into the load side. the power side is +12V to light up the switch when it's on.

from your description you wired it up just fine, I don't know what killed the battery. Leave the lights on? I do that all the time...

Axoure Dragonkin
Posts: 194
Joined: Sat Sep 11, 2004 9:46 am
Car: '92 Nissan 240sx se

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ah i think i get what you said, battery to load on switch, power on switch to fan, fan to ground and ground on switch to ground.

BTW I wired it like in the diagram and it works fine now.

SMoKeM240
Posts: 149
Joined: Sat Nov 06, 2004 7:41 am
Car: 89 240sx NA/KA

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yea u did it wrong, blue wire on fan goes to middle on the switch, then the top one is for power, so run a wire from bat to that, and the bottom one is a ground for the switch so the light works, just ground the fan wire inside the enigne bay somewhere


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