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Hey all, curious about the intake grid heater. How does it work pertaining to hooking it up. What runs it, turns it on and off. Is it straight 12volts? Does it run 24/7 while engine running? I am doing a swap but have no computer or wiring harness to speak of. If it is simply straight power for Cold starting, maybe a timer switch on the dash? Thanks
In a '97 stock setup the relays receive constant power. The PCM supplies a ground timed according to outside temps. The grids draw a lot of amperage and require relays in the circuit. I bypassed my PCM and have the ground going thru a toggle switch. I can heat the grids as long as I want prior to starting, or not at all if I wish. I also do not have to put up with the grids activating after the engine has started.
97 3500, 2 WD, G56, slightly bombed, 975,000+miles
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