Pinpoint Test 1

PINPOINT TEST 1:THE FOG LAMPS INOPERATIVE

Normal Operation
The battery junction box (BJB) provides voltage to the fog lamp relay through circuit (W/R). When the fog lamp switch is engaged, a voltage signal is routed to the smart junction box (SJB) through circuit (GY/V). The fog lamp relay coil ground is controlled by the SJB through circuit (BR). When the fog lamp relay is energized, voltage is routed to the fog lamps through circuit (BR/Y).
- DTC B2030 (Front Fog Lamp Relay Ckt Failure) - is a continuous and on-demand DTC that sets when the SJB detects a short to ground from the fog lamp relay coil around control circuit.
- DTC B2512 (Front Fog Lamp Relay Ckt Short to Battery) - is a continuous and on-demand DTC that sets when the SJB detects a short to voltage from the fog lamp relay coil control circuit.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Fog lamp relay
- Headlamp switch
- SJB

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Step 1-Step 7:

Step 8-Step 12:

Fog Lamp Relay Component Test:

Headlamp Switch Component Test: