Transmission swap??
#21
Senior Member
True Car Nut
if the lt green wire was shorted to ground it would keep the solinoid on. pull the plug and the pcm plug and use a meter set on ohms check the wire to battery neg. should be infinite. if 0 you have to find where the wire is touching
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nwohiochevyguy (06-17-2014)
#22
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So much for that idea, the only thing to ground in the transmission 19 way conductor is the ground wire (black/white) as it should.
I can wiggle the green wire some in the socket and see the contact in the connector move, could not having contact at this location cause the problem?
I can wiggle the green wire some in the socket and see the contact in the connector move, could not having contact at this location cause the problem?
#23
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OK I ordered a 20 pin universal GM transmission connector / pigtail assembly so that I can properly read the resistance values on the transmission solenoids, to rule out internal issues.
I will also check the transmission I removed to confirm if any issues were there as well....I suspect the issue I am having is not internal to the transmissions.....but this will confirm it for certain.
I will also check the transmission I removed to confirm if any issues were there as well....I suspect the issue I am having is not internal to the transmissions.....but this will confirm it for certain.
#27
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I wanted to confirm the PCM location.
Is it on the firewall just inside the drivers side strut tower?
If that is it how do you unlock the large connector that goes into it? Does the metal band/lock just rotate up?
Trying to look at the schematics on gmpartsdirect to get an idea and its a little confusing, makes it look like its next to the ignition module on the front passenger side of the engine. But it may just be how they have the exploded views done.
Is it on the firewall just inside the drivers side strut tower?
If that is it how do you unlock the large connector that goes into it? Does the metal band/lock just rotate up?
Trying to look at the schematics on gmpartsdirect to get an idea and its a little confusing, makes it look like its next to the ignition module on the front passenger side of the engine. But it may just be how they have the exploded views done.
#29
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Talked to a transmission guy this morning. The PCM turns on the shift silinoids in these transmissions by closing the ground on them. So an open / broken wire would do what I'm seeing for sure.
I will be tracing and checking the wire for the 1-2 silinoid tomorrow when I get home.
I will be tracing and checking the wire for the 1-2 silinoid tomorrow when I get home.
#30
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OK does anyone have a wiring diagram of the PCM outs?
Pulled the plugs tonight and yes it is behind the glove box, but there are two light green wires landed side by side in the back connector.
Want to ensure I am troubleshooting the right circuit.
And I did receive a "test" plug for the transmission and both shift solenoids test perfectly at 21.5 ohms
Thanks in advance
Pulled the plugs tonight and yes it is behind the glove box, but there are two light green wires landed side by side in the back connector.
Want to ensure I am troubleshooting the right circuit.
And I did receive a "test" plug for the transmission and both shift solenoids test perfectly at 21.5 ohms
Thanks in advance
Last edited by nwohiochevyguy; 06-23-2014 at 07:24 PM.