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E-Fan Gremlins by Snaps on 01 Mar, 2015 22:40
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So my E-fan was working prior to me pulling my motor and relocating my battery as well as some other mods. Now of course its not. I hadn't touched any of the fans wiring during this ordeal but as I was testing all my components I found it to be inop. Its currently connected to a relay and toggle switch, I have tested for current and continuity both are good. The only way I can get it to turn on is if I directly hook the positive and negative wires to the same battery. It does not operate from any ground on the chassis nor motor. WTF? Like I said I'm getting my 12v at the power wire to the fan and my chassis grounds are clean and free of paint but it just doesn't work that way. I could just run a wire all the way to the batteries ground and be done with it however I would like to know why it was working before but not now. Thx
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#1 by digitalsolo on 01 Mar, 2015 23:23
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Break in the circuit.... Either wires, switch or relay.
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#2 by Snaps on 02 Mar, 2015 11:35
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Already tested the relay and wires.
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#3 by digitalsolo on 02 Mar, 2015 11:43
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There is no magic here.
If you connect a wire from the battery to the fan positive, and leave the fan grounded to chassis, does it turn on?
Yes: Power feed issue. Check your power wiring and relay.
No: Your ground is bad. Either your ground feed from battery to chassis is insufficient (does the car start and run?) or the ground for the fan has an issue. -
#4 by Snaps on 02 Mar, 2015 16:19
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Its not all put together to run yet but it does turn over. And like i said i didnt touch the the ground and it worked before. Thx
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#5 by digitalsolo on 02 Mar, 2015 21:49
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Did you do what I told you? If you moved the battery you definitely touched a ground. Speaking as a guy who went to college for electrical engineering and has built/wired 20+ RX7 swaps, go do what I told you to do and figure out what went wrong. We can't troubleshoot your car with psychic powers, you have to do some leg work here.