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Home >> GMC >> 1997 >> Yukon 4D Utility, RWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> Testing >> Left Front Window Does Not Operate

Left Front Window Does Not Operate

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  1. Disconnect left front window motor connector. Turn ignition on. Connect test light between left front window motor connector Dark Blue wire and ground. Move left front window switch to UP position. If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Blue wire. If wire is okay, replace left front window switch.
  2. Connect test light between left front window motor connector Dark Blue and Brown wires. If test light illuminates, replace left front window motor. If test light does not illuminate, repair open in Brown wire. If wire is okay, replace left front window switch.
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