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Trying to take readings on the connector pins coming into my e40d transmission. '91 Ford F-250 XLT Lariat. On pin 8 with the key on engine off I'm getting 36 Ohms.
According to the solenoid chart I have, pin 8 should be "signal return."
Am I supposed to be reading Ohms or voltage? I'm not getting any readings on any other pins. Should I have the truck running?
You need to measure DC volts in this case.
If you wanted to measure for wire continuity between the PCM and trans connector then you would use the OHMS setting, but both connectors would be detatched from thier devices and vehicle power would be off, and the readings should be close to zero ohms.. or a dead short which is what a piece of wire is.
What exactly are you trying to measure/diagnose? Pin 8 on the solenoid pack connector is Signal Return via Pin 46 of the computer (EEC-IV). If I was trying to verify the path to ground was good I would set my meter to Ohms and have the other meter lead referenced to ground.
I did measure DC Voltage. The only reading I could get out of anything was when I switched my Fluke 87 to read Ohms. I am an electrician of 30+ years. Hence my screen name. It was just the chart the someone shared with me doesn't specify to get a reading of voltage(DC, of course) or Ohms. Also, thanks for y'all's assistance.
Originally Posted by Conanski
You need to measure DC volts in this case.
If you wanted to measure for wire continuity between the PCM and trans connector then you would use the OHMS setting, but both connectors would be detatched from thier devices and vehicle power would be off, and the readings should be close to zero ohms.. or a dead short which is what a piece of wire is.
Also, I'm just trying to verify the pin-out locations are in the correct groove of the connecter. Because even after wiring it color for color; and double and triple verified the order, I still am only running in limp mode.
Most likely looking at the pins. But with the above diagram of the connector should be easy to figure out look at the pin number on the connector and where the 2 empty spots.
Thanks for the verification. I had it wired correctly. Now, onto what else could be wrong. I don't think any of these wires have in-line fuses in them.
Originally Posted by toolman60
Most lkely looking at the pins. But with the above diagram of the connector should be easy to figure out look at the pin number on the connector and where the 2 empty spots.
Your Pin#1 in your pic from post #1, almost looks like it sits lower than the other female pins.
When you plug into trans, it might be pushed up, not making a good connection.
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