Pinpoint Test 1: Both High Beams Are Inoperative

PINPOINT TEST 1: BOTH HIGH BEAMS ARE INOPERATIVE

Normal Operation

When the headlight switch is placed in the HEADLAMPS ON position, the smart junction box (SJB) monitors the high beam request circuit from the multifunction switch through circuit (GY/BR). When the multifunction switch is placed in the HIGH BEAM position, the signal is routed to ground through circuit (B/L). The SJB then energizes the high beam relay (integrated into the SJB) which supplies voltage to the headlamps through circuit (Y/V).

Possible Causes
- Fuse
- Wiring, terminals or connectors
- Multifunction switch
- SJB

Diagnostic Procedure

CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE:The battery ground cable must be disconnected for accurate test results when checking ground circuits for continuity to ground.