Initial Inspection and Diagnostic Overview

1. If one Headlight doesn't work, check the bulb, connectors, and wires to the bulb.
2. If Hi Beams do not light, but the Hi Beam Indicator lights, check 11 circuit wire for an open.
3. If Headlights on one side are dim, check the ground on that side.
4. If the Headlights do not turn off, replace the Head/Park Light Switch. If Headlights with Twilight Sentinel/Daytime Running Lights do not turn off, refer to Vehicle Lighting/Daytime Running lamp.
5. If the Hi Beams light, but the Hi Beam Indicator does not, check the bulb and the 11 circuit and BLK (152) wires for an open.