Transmission Wiring Harness.

[9SECVSIX]

With the key on and motor not running is there suppose to be 12 volts at terminal B and C That's the 4th and 3 gr pressure switches.
thanks
B.

 

[aminga]

I'm pretty sure the switch completes the ground. Most of the ECM switches are like that.

 

[9SECVSIX]

I'm pretty sure the switch completes the ground. Most of the ECM switches are like that.

That what I thought also. I can't find out how the 12 Volts is getting on these two wires, I even swapped computers and there was no change. The circuit keeps blowing the emc-sole fuse.

 

[Mark E.]

The 12v on b and c is from the ecm. There is what is called a pull up resister in the ecm. This is ok.

ecm/sol fuse powers the purple wire to the trans at a. This is fed through the brake switch. 12v brake off, ov brake on.

Ecm/sol fuse also powers wastegate and can purge solenoids, egr relay and ac cutout relay.

Does the fuse blow immediately? Maybe unplug all those things, then plug them in one by one until the fuse blows?