Sorry, your just a married couple then?RSR 555 wrote:I was under the impression that the 4th wire went to the ECU and the 3rd wire went to the dash? Need to see wiring diagram to see for sure.
Who you calling old?

It could be for a number of things. I dare say a pull up to trick the ecu or dash. Pretty low value resistor for that though??? Do you have a wiring diagram? If its too low value resistor it could potentially damage something.
Probably just makes the car go vrrrrroooommmm!
Regards
Doug