NEED HELP FAST DOING JOB NOW...PLEASE READ

[anthony gorman]

My friend’s tranny in his 1999 blazer was acting up so I told him to come over so I could read the code that it was throwing. There were 2 of them. One was P0751 (shift solenoid A performance or stuck off). The second was code P0753 (shift solenoid A electrical).

- So my friend and I got a new solenoid. We decided to test the wires going to it and we found a problem…
-
- Current configuration: Battery still connected, ignition off, trany in park, tranny wiring harness unplugged from trany only.

- Checking wire harness for shorts at pins A & N (troubled solenoid “A” 1st and 2nd gear).
Remember the other end of the harness is still plugged into the PCM. Pin A read opened and pin N read approximately 300K ohms. Should both have read open?

- Also checked resistance of the old solenoid and it was infinite or open and the new solenoid read 22 ohms. Does this sound correct?

[chas]

measuring the resistance of the pcm's driver is pretty fruitless. it should be a fairly high value but i would expect infinite. checking each line for being shorted to ground is probably a good idea though. one might be a path to ground but the other shouldnt. anyway the 300k sounds good.

the coil on the solenoid should not be 0 or infinite. 22 ohms sounds like a normal value (its just a big spool of wire, it doesnt have much resistance).