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Rear Defrost Switch to on/off switch


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Anyone know how i can modify an extra rear defrost switch (from a 97 lgt) to be an on/off switch?......"On" needs to complete the circuit by grounding a pin on the tcu and "Off" needs to un-connect the circuit.......The switch i have is a push button switch and i found that i need a relay....any idea on which one and how to wire it up. Thanks.....


Right now it is doing what I kind of want it to do, I just have to hold down the button for the circuit to be completed, but would be nice if it was on/off

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