NOTE: Before testing, check for a blown No. 6 (7.5A) fuse in the under - dash fuse/relay box. Disconnect the 3P connector (A) from the headlight adjuster unit (B). Wire side of female terminals Check for continuity between the No. 3 [No. 1] terminal and body ground. Is there continuity? YES – Go to step 3. NO – Check for these problems: Repair open in the BLK wire between the headlight adjuster unit and body ground. Poor ground (G201, G301). Check for voltage between the No. 1 [No. 3] terminal and body ground. Is there battery voltage? YES – Go to step 4. NO – Repair open in the YEL/GRN wire between the headlight adjuster unit and under - dash fuse/relay box.

Using an ohmmeter, measure resistance between the No. 2 terminal and body ground in position 0 of the headlight adjuster switch. Is there about 730 ohm? YES – Check for frozen, stuck or improperly installed the headlight adjuster unit. If the mechanical check is OK, replace the headlight adjuster unit. NO – Check for these problems: Poor ground (G501). An open in the BLU/BLK wire between the headlight adjuster unit and headlight adjuster switch. A faulty headlight adjuster switch. [ ]: 5-door