1993 Pinpoint Test B - Speedometer Indication Erratic Or Needle Wavers Excessively
- Check speed sensor connection at transmission. If connection is loose or defective, repair as necessary. If connection is good, go to next step.
- Temporarily substitute known good speed sensor. If speedometer now operates okay, original speed sensor is defective. If speedometer is still erratic, reinstall original speed sensor. Go to next step.
- Using ohmmeter, check for continuity between pin No. 10 (Dark Green/White wire) of instrument cluster connector "A" and speed sensor while wiggling wiring. Instrument cluster connector "A" is 14-pin connector on left side of instrument cluster as viewed from rear.
- Check for continuity between pin No. 11 (Orange/Yellow wire) of instrument cluster connector "A" and ground while wiggling wiring. Check for continuity between pin No. 12 (Red/Yellow wire) of instrument cluster connector "A" and fuse No. 18. Fuse is located in fuse panel below left side of instrument panel.
- If no continuity exists or continuity is erratic, repair wiring as necessary. If continuity exists and remains steady, go to next step.
- Check for continuity between instrument cluster printed circuit and Dark Green/White, Orange/Yellow, and Red/Yellow wire terminals of connector "A".
- If continuity does not exist, replace defective wiring or terminals. If continuity exists, replace speedometer. Adjust odometer mileage on replacement speedometer. Install odometer sticker on driver door pillar to indicate speedometer replacement.