No guages/AC Compressor does not engage, related?

[fordmb]

Hi All,

I have a couple problems that I think may be related.

First off, I have no spedo or tach indications on the dash, and I have a hard time trying to get a scanner to connect to pull any codes.

Also, the AC compressor will not engage unless I jump 12v to the solenoid directly, even though pressures and the high/low pressure switches are working correctly.

My question is, I know that the circuit to engage the compressor after selecting A/C on the EATC control, utilizes grounds thru the PCM, to engage that circuit.

What are the odds that a bad PCM is causing my gauge/communication, and AC issues?


Thanks guys.

 

[Number4]

Read the sticky "Have a 4.6? Here's a problem..." It may be the answer.