D350 1 Ton Pickup 2WD V8-318 5.2L VIN R 4-bbl (1982)
Backup Lamp Switch: Service and Repair
1. Unscrew switch from transmission case, allowing fluid to drain into container.
2. Move shift lever to Park and then to Neutral positions and inspect to ensure switch operating lever is centered in switch opening in case.
3. Screw switch into transmission case, then add fluid to the proper level.
4. Check to ensure proper switch operation.