Temperture gauge is pegged on high

[dmjlambert]

The dark green wire goes to the ignition switch only on trucks with warning lights instead of gauges. That is to ground the sender during engine start and give a bulb check like you get for the brake light. You don't have that connection.

I don't think you need to worry about this additional wire testing. You already took care of it well enough on post 64 on the previous page of this thread.

[Seventy Two]

Originally Posted by dmjlambert

The dark green wire goes to the ignition switch only on trucks with warning lights instead of gauges. That is to ground the sender during engine start and give a bulb check like you get for the brake light. You don't have that connection.

I don't think you need to worry about this additional wire testing. You already took care of it well enough on post 64 on the previous page of this thread.

Thanks for clarifying the wiring diagram. This makes sense as the 20DG wire appears to go directly to the gauge cluster plug #6 connector.
Now I'm stumped again.

[tdangle]

so to simplify, the wire going from the sending unit to the connector at the gauge cluster has continuity and is not shorted to ground, with the wire disconnected at the sending unit and unplugged at the gauges, Correct? If that is the case the problem is in the gauge cluster.

[Seventy Two]

Originally Posted by tdangle

so to simplify, the wire going from the sending unit to the connector at the gauge cluster has continuity and is not shorted to ground, with the wire disconnected at the sending unit and unplugged at the gauges, Correct? If that is the case the problem is in the gauge cluster.

Hi Terry, yes your recap of the continuity and not shorted to ground is exactly correct.