I'm in the windshield biz and want to install an aftermarket auxiliary heater in the cargo area of my '97 E250. I have the OEMrear heater fan control on the dashboard and all wiring that ends in a factory wiring harness connector located on the Bpillar right behind the drivers seat.

Any hintsor tips on such a refit? I have the complete Ford factory service manual including the wiring schematics. I'd appreciateany information or advice from other successful installations like this.


Thanks all!