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fearone · 08-20-2014, 09:49 AM

Im playing with the idea of fitting a oem coolant heater off a diesel bmw into my car.

It has 4 wires, a thick positive and negative pus two thin wires which usually go to the heater control unit in the bmw.

The thing I'm not sure about is how to wire a switch up to it?

Will add more details later. Any advice welcome as I'm not too good with auto electronics.

08-20-2014, 09:49 AM	#1 (permalink)
fearone EcoModding Lurker Join Date: Aug 2013 Location: United Kingdom Posts: 29 Astra 1.7cdti - '03 Opel/Vauxhall Astra Eco4 cdti Thanks: 32 Thanked 4 Times in 4 Posts	12v auxilary coolant heater from a BMW Im playing with the idea of fitting a oem coolant heater off a diesel bmw into my car. It has 4 wires, a thick positive and negative pus two thin wires which usually go to the heater control unit in the bmw. The thing I'm not sure about is how to wire a switch up to it? Will add more details later. Any advice welcome as I'm not too good with auto electronics.