The left rear window will roll down but not up. I replaced the motor and regulator and the master window switch. Rear window switches both work fine.
Just out of the blue, the window stopped going up.
check the wiring and connectors. you have power letting the window go down but not going up. You replaced everything so I’m guessing it has to be a wire or a bad connector.
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So the rear window switch rolls the window up/down with no issues??
If so, then you might look at the wiring, as mentioned above, in the door harness from the front door to the A pillar area, possibly rear door to the B pillar…
Might want to get a wiring diagram to see what all is involved…
Is the window motor rotating at all for the up direction? Is it getting 12 volts?