NoRotors.com - RX7 Engine Swap Forum

Technical Information => Electronics => Topic started by: Snaps on March 01, 2015, 10:40:57 PM

Title: E-Fan Gremlins
Post by: Snaps on March 01, 2015, 10:40:57 PM

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

Title: Re: E-Fan Gremlins
Post by: digitalsolo on March 01, 2015, 11:23:28 PM

Break in the circuit....   Either wires, switch or relay.

Title: Re: E-Fan Gremlins
Post by: Snaps on March 02, 2015, 11:35:58 AM

Already tested the relay and wires.

Title: Re: E-Fan Gremlins
Post by: digitalsolo on March 02, 2015, 11:43:43 AM

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.

Title: Re: E-Fan Gremlins
Post by: Snaps on March 02, 2015, 04:19:08 PM

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

Title: Re: E-Fan Gremlins
Post by: digitalsolo on March 02, 2015, 09:49:32 PM

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.