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The Jeep Grand Cherokee is a mid-size luxury SUV produced by the American manufacturer Jeep. While some other SUVs were manufactured with body-on-frame construction, the Jeep Grand Cherokee has always used a unibody chassis.

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Why won't my power Windows work?

I have a 1999 jeep grand Cherokee with the v8 engine and none of my Windows will go up or down. The power locks on the drivers side doesn't work but the power locks on the passengers side does work. My sunroof works also. Can someone please give me some helpful advice on what's wrong and how to fix it. Thanks.

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Check wires in door. There is a black rubber cover connecting from body to door. Cut open and check if wires split. Mine did and the locks worked but Windows did not. Found that wires broke. Reconnected wires. Problem solved.

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@mrharris here is what the manual says:

ALL WINDOWS INOPERATIVE

(1) Check the operation of the power lock switch on the driver side front door. If all of the doors lock and unlock, but none of the power windows operate, use a DRB scan tool and the proper Diagnostic Procedures manual to check the Body Control Module (BCM), the Driver Door Module (DDM) and the PCI data bus for proper operation. If not OK, go to Step 2.

(2) Check the operation of the power lock switch on the passenger side front door. If the passenger doors lock and unlock, but the driver side front door does not, go to Step 5. If all of the power locks and power windows are inoperative from both front doors, go to Step 3.

(3) Check the fused B(+) fuse in the Power Distribution Center (PDC). If OK, go to Step 4. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.

(4) Check for battery voltage at the fused B(+) fuse in the PDC. If OK, go to Step 5. If not OK, repair the open fused B(+) circuit to the battery as required.

(5) Disconnect and isolate the battery negative cable. Remove the trim panel from the driver side front door. Disconnect the 15-way door wire harness connector from the DDM connector receptacle. Check for continuity between the ground circuit cavity of the 15-way door wire harness connector for the DDM and a good ground. There should be continuity. If OK, go to Step 6. If not OK, repair the open ground circuit to ground as required.

(6) Reconnect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the 15-way door wire harness connector for the DDM. If OK, replace the faulty DDM. If not OK, repair the open fused B(+) circuit to the fuse in the PDC as required.

The first thing I would check is the power window switch

DIAGNOSIS AND TESTING

The diagnosis found here applies only to the rear door power window switches. If the problem being diagnosed is an inoperative power window switch illumination lamp, but the power window switch operates as designed, replace the faulty rear door power window switch. For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

(1) Disconnect and isolate the battery negative cable.

(2) Remove the power window switch from the rear door trim panel.

(3) Check the rear door power window switch continuity as shown in the Rear Door Power Window Switch Continuity chart (Fig. 1). If not OK, replace the faulty rear door power window switch.

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Now here is an issues to think about, since you also have trouble with your door lock you may have issues with the Body Control Module so let us know what you find out.

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Thankyou so much I'll definitely give this a try. Thanks again.

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The best trouble shooting i've found! Thanks a billion!

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Reggie Harris will be eternally grateful.
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