Way Outta Control
Join Date: Sep 1999
Location: The Palouse
Thanked 3 Times in 3 Posts
Re: Wiring a second heater motor?
Run a second circuit, with it's own breaker. This way you'll make sure that the second circuit is fully protected. 'As for the switch... keep it simple and install a second OEM or aftermarket Jeep Heater/blower switch. Install it on the second circuit to control only the auxilary fan.
You would also have to use a OEM plug for the wiring, or hard wire the connectors. Because of the high current draw, I would suggest using the OEM plug. Also duplicate the speed resistors by using OEM resistors that are mounted on the Heater Box.
By keeping the duplicated circuit parts as close to OEM as possible parts are avalible. If you decide to use other parts, such as from a Ford, Chev, etc., that's not a bad idea, but keep the make, model, year and the VIN number from the donor vehicle. You may need that information in the future for parts replacement.