Pinpoint Test B - Speedometer Indication Erratic Or Needle Wavers Excessively

Verify condition, ensure speedometer is erratic or fluctuating. If speedometer is erratic or fluctuating, proceed to step 2).
Checking speed sensor connection, check speed sensor connection at transmission. If connection is loose or defective, repair as necessary. If connection is good, proceed to step 3).
Checking speed sensor operation, replace speed sensor and road test vehicle. If speedometer operates okay, original speed sensor is defective. If speedometer is still erratic, reinstall original speed sensor and proceed to step 4).
Checking signal at connector plug, using ohmmeter, check continuity between pin No. 10 (Dark Green/White wire) of instrument cluster connector "A" and speed sensor while wiggling wiring. The instrument cluster connector "A" is the 14-pin connector on left side of instrument cluster as viewed from rear of instrument cluster.
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, proceed to step 7).
Checking printed circuit continuity, check for continuity between instrument cluster printed circuit and Dark Green/White, Orange/Yellow, and Red/Yellow wire terminals of connector "A".
If no continuity exists, 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.