Djmack
NAXJA Forum User
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- Travis AFB
Sounds like the computer is looking for a minimal resistance. Maybe ohm out your fan. And match the resistance with the proper resistor.
Sounds like the computer is looking for a minimal resistance. Maybe ohm out your fan. And match the resistance with the proper resistor.
All he needs is to fool the computer into it's thinking that it's engergized a coil. There's probably a current sensor inside the ecu. Most bosch relay coils draw about 120-150ma. So that would be around 80 ohms at 12v. Which would require a 2w resistor. You can probably get by with more resistance. 470 ohm, and 4700 ohm are common resistors available at radio shack. I'd try a 4700 ohm between the pin and 12v, if tha clears it great, if not drop it down to a 470 ohm. With either of those you can get by with a 1/8 watt resistor, which is easy to shrink wrap and bury in the harness.
Relay Pin 85 - DB/PK wire coming from your PCM
Relay Pin 86 - DB/WT (ST-RUN) wire
Relay Pin 30 - Ground wire
Relay Pin 87 - DB/PK wire going to the Fan Motor Relay (in the PDC) and the ground signal wire coming from your override switch
Relay Pin 87a - May or may not exist on your relay, but is unused regardless