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Home >> Jeep >> 2003 >> Grand Cherokee Laredo, 4.0 S, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Body Control Modules) >> Symptom Tests >> Exterior Lighting Systems >> Flash To Pass Inoperative
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Flash To Pass Inoperative

WARNING: This page is about a different car, the 2002 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes are:

  1. The High Beam Headlamps must be operational for the result of this test to be valid. Disconnect the left multi-function switch harness connector. Measure the voltage of the High Beam Relay control circuit in the left multi-function switch connector. Is the voltage more than 10 volts? If yes, replace the Left Multi-Function Switch. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
  2. Turn ignition off. Disconnect the left multi-function switch connector. Disconnect the Junction Block C3 harness connector. Using an ohmmeter measure the High Beam Relay control circuit from the left multi-function switch connector to the Junction Block C3 connector. Was the resistance less than 5 ohms? If yes, replace the Junction Block. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, repair the High Beam Relay Control circuit for an open. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
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