Right rear window will go down but not up?

Tiny
MRHILL007$
  • MEMBER
  • 2000 JEEP GRAND CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 258,000 MILES
From both the driver and the Rt rr door switches the window goes down, not up. I'm able to hot wire the motor to make it go up. With auxiliary on, I'm getting 12V to both up/down feeds at the switch connection. The switch continuity tests as follows:

G and G/Wt
Gy and Gy/Wt
G/Wt and Blk in one position
Gy/Wt and Blk in the other

I'm getting constant 12V to both wires at the motor connection.
Seems like 2 12V feeds to the motor is a bad thing.
I get microvolts to one side when the switch is activated and 12V to the other, in either position.

I am currently driving with the switch removed.

Side note:
I'm pretty sure I have some grounding gremlins as only half the dash lights work sometimes. The transmission shift plate lights work occasionally as well as at the temp control lights. They don't flicker. They're either on or off.
They don't usually change while operating. They've been off for a while.
Oh, and cruise control stopped working. Dash indicator comes on but no control.
Sunday, March 9th, 2025 AT 3:26 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,009 POSTS
If the master switch is bad the switch at the window will not work window. Here are the wiring diagrams to help you see how the system works and a guide to test for power and ground.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here is how to change the master switch out which might fix the problem. Also, I see there is a passenger side door module which I have seen go out as well. Check out the images (below). Let us know how it goes.
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Monday, March 10th, 2025 AT 11:30 AM

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