Quote:
Originally Posted by Bucks68
The one in this truck has 8 cyl stamped on the back side, so the question is, is it reading accurately?
Good news... I was able to get the dash lights working! One thing I still have is the BRAKE light is on constantly, unless I unplug it from the proportioning valve. The brakes work fine, so what could cause it to be on?
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No, it won't be reading accurately, basically 75% of actual motor RPM.
I'm guessing someone bled the brakes without the little tool that holds the proportioning valve piston in the center (with air upstream of the proportioning valve). This happens when someone replaces a master cylinder. You will need to re-center it to get the brake light to shut off.