This is topic Electric fan wiring with battery relocation in forum Tech Talk at Northern California Ford Owners .
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Posted by BayAreaNotch (Member # 12248) on
:
I recently did a motor swap on my notch. I cleaned up the engine bay and decided to relocate the battery to the trunk. I upgraded from clutch fan to electric. I have a switch that I use to manually turn on the fan with a 30 amp fuse. Right now I am getting power from the solenoid in the engine bay and I grounded the negative to the body. (I sanded the area to bare metal). Right now my car starts over heating while in town. I pulled the black magic fan and I connected it directly to a battery and it sounded like it has twice as much power when I connect it directly to the battery. Is it possible that it isn't getting enough juice with the ground wire bolted to the body and positive to the solenoid.? Should I rewire my fan directly to the battery in my trunk? Any tips and adive will be greatly appreciated!
Posted by Martinna (Member # 12493) on
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You probably have a lossy connection somewhere. Maybe a bad ground. Maybe a bad connection. Run the fan and feel around things like the fuse holder, does it get warm? Any connection that gets warm after running the fan for a few minutes means that connection is lossy and costing you power. Do you have a volt meter to measure the voltage right at the fan?
Posted by 4IDFOX (Member # 9921) on
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Most likely your switch is not up to the task. High amp accessories work best with a relay. Wire in a relay and let the switch turn the relay on and off. Use the switch on the ground for the relay is best.
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