I'm installing a pusher fan and need a little guidance with the wiring hookup. The fan has 2 wires, black and red. I know the black is the ground and the red is hot. I think I need to run the red wire to a relay switch or fuse then onto the negative battery terminal. I want to then run the wire into the cockpit to a switch to manually control the fan. Where I'm confused is after hooking the wire out of the relay switch to the negative terminal do I continue the same wire to the cockpit switch, or do I need to run a new wire from the positive terminal to the cockpit switch. I'll ground the cockpit switch to the firewall and use the hot lead from the battery for the other connection on the cockpit switch. Am I close or way off base here???
Here you go http://mmb.maverick.to/showthread.php?t=12800&highlight=diagram+relay Keep in mind that since you are using your fan as a pusher you may need to reverse the red and black wires on the fan. I would test it before you start wiring everything.
The fan is a specific pusher, not a reversible, so i'm confodent about the wires. Do i have the wiring path correct.
Thanks Guys. I think i have a handle on it now. Maverick1970, I finally did see the link to the diagram. I'm new at this forum stuff so i'm not seeing everything i should yet.
The fan I bought was a specific puller and it ended up the blue wire was the ground and the black was hot. I overheated my engine, it only takes a second to check. Positive wire from fuse panel to switch, from switch to relay, relay to ground. Battery power to fuse, fuse to relay (87) relay (87b) to fan, fan to ground.
To keep from overloading the switch. Larger fans may draw 30-50 amps, with a spike during startup (common to all electric motors), and most switches can't handle that kind of current for very long.
