Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP1999CHEROKEE 4WD L4-2.5L VIN PREPAIR AND DIAGNOSISWINDOWS AND GLASSWINDOWSPOWER WINDOW CONTROL MODULETESTING AND INSPECTION
1999 Jeep Cherokee 4WD L4-2.5L VIN P
Power Window Control Module: Testing and Inspection
1999 Jeep Cherokee 4WD L4-2.5L VIN PSECTION Testing and Inspection
The Driver Door Module (DDM) contains the master switches and the lockout switch in the power window system. The DDM also contains an integrated circuit to support the one-touch down feature of the driver side front door power window. Remember that the passenger side front door power window switch and, on four-door models, the rear door power window switches get their battery current through the power window lockout switch in the Driver Door Module (DDM). In addition, each individual power window switch gets its ground through the master switch in the DDM.
The one-touch down feature circuitry within the DDM will not operate the power window motor if the door glass, window reregulator or gearbox mechanism are stuck, obstructed, or binding. If the driver side front door power window operates as designed, but the one-touch down feature is inoperative, replace the faulty DDM.
If the problem being diagnosed is an inoperative power window switch illumination lamp, but the power window switch operates as designed, replace the faulty door module.
1. Disconnect and isolate the battery negative cable. Remove the front door trim panel and unplug the door module wire harness connectors from the door module.
2. Check the door module power window switch and/or power window lockout switch continuity in each position, as shown in the proper chart. If OK, see the Power Window Motor diagnosis. If not OK, replace the faulty door module.
The one-touch down feature circuitry within the DDM will not operate the power window motor if the door glass, window reregulator or gearbox mechanism are stuck, obstructed, or binding. If the driver side front door power window operates as designed, but the one-touch down feature is inoperative, replace the faulty DDM.
If the problem being diagnosed is an inoperative power window switch illumination lamp, but the power window switch operates as designed, replace the faulty door module.
1. Disconnect and isolate the battery negative cable. Remove the front door trim panel and unplug the door module wire harness connectors from the door module.
DDM Power Window Switch Continuity:
PDM Power Window Switch Continuity:
2. Check the door module power window switch and/or power window lockout switch continuity in each position, as shown in the proper chart. If OK, see the Power Window Motor diagnosis. If not OK, replace the faulty door module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.