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Test U: 4X4/Low Range Indicator Light Inoperative (Manual Shift)

  1. Disconnect 4x4 switch harness connector C161. Connector C161 is located below center of vehicle, near digital transmission range sensor. If 4x4 light is inoperative, connect a 10-amp fused jumper wire between ground and terminal No. 2 (Light Blue wire) at 4x4 switch harness connector. If LOW RANGE light is inoperative, connect jumper wire between ground and terminal No. 1 (Light Blue/Black wire) at 4x4 switch harness connector. Turn ignition switch to RUN position. If light illuminates, replace 4x4 switch. If light does not illuminate, go to next step.
  2. Turn ignition switch to LOCK position. Check inoperative indicator bulb. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. If bulb is okay, go to next step. If bulb is not okay, replace bulb.
  3. If 4x4 indicator light is inoperative, measure resistance of Light Blue wire between terminal No. 2 at 4x4 switch harness connector C161 and terminal No. 4 at instrument cluster harness connector C250c. See Figure. If LOW RANGE indicator light is inoperative, measure resistance between terminal No. 10 (Light Blue/Black wire) at instrument cluster harness connector C250c and terminal No. 1 (Light Blue/Black wire) at 4x4 switch harness connector C161. If resistance is 5 ohms or less, replace instrument cluster. If resistance is more than 5 ohms, repair open in appropriate wire(s) and retest.
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