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Thanks jeepcj so your heater motor is off when the switch is oriented with the low terminal orange wire on the top and the high terminal on the bottom red wire and the toggle is pushed all the way down when the toggle is in the middle your fan runs at the low speed and when the toggle is all the way up your fan runs at high speed. Re heater relay upgrade wiring install for cj7 ive heard of the blazer blower motor swap in later model cjs 3 wire but not the resistor relay upgrade your cj has a two wires plug and all power comes from the two wires fed from the switch. 33 48 of 377 results for jeep heater switch skip to main search results automotive relay set 5 pin 40a 12v spdt with interlocking relay socket wiring harnesses 1 year free replacement warranty only 8 left in stock order soon jeep cj single aluminum heater or windshield wiper switch knob in black 899 8 99 free shipping only