Speedometer Or Odometer Inoperative

Verify condition, road test vehicle and note speedometer and odometer operation. If speedometer and odometer do not operate, proceed to step 3) for vehicles with speed control, or step 4) for vehicles without speed control.
If only speedometer or odometer operates, replace speedometer. Adjust odometer mileage on replacement speedometer and install odometer sticker on driver-door pillar to indicate speedometer replacement.
Checking speed control, road test vehicle and check speed control operation. If speed control operates, proceed to step 8). If speed control does not operate, proceed to step 4).
Checking speed sensor resistance, disconnect speed sensor electrical connector at transmission. Using ohmmeter, check resistance between speed sensor terminals. Resistance should be 200-300 ohms.
If resistance is within specification, proceed to step 6). If resistance is not within specification, replace speed sensor and repeat step 1).
Checking speed sensor signal, connect voltmeter on output wires of speed sensor. Adjust voltmeter to AC voltage setting. Raise and support vehicle. Operate vehicle at approximately 20 MPH and note voltage reading.
If voltmeter reads 1.5-6.5 volts, proceed to step 8). If voltage does not exist or is less than 1.5 volts, replace speed sensor. Ensure all connections and wiring are okay.
Checking speedometer fuse, check 10-amp fuse No. 18. Fuse is located in fuse panel below left side of instrument panel. If fuse is okay, proceed to step 9). If fuse is defective, replace fuse and checking wiring circuit.
Checking speed sensor drive gear, remove speed sensor from transmission. Check drive gear and retaining clip for damage. If drive gear and retaining clip are damaged, replace components as necessary. If drive gear and retaining clip are okay, proceed to step 10).
Checking transmission drive gear, remove speed sensor from transmission. Check drive gear for damage. If drive gear and retaining clip are damaged, replace drive gear. If drive gear and retaining clip are okay, proceed to step 11).
Checking wiring harness, using ohmmeter, check for short to ground and check wire continuity between pin No. 10 (Dark Green/White wire) of instrument cluster connector "A" and speed sensor. The instrument cluster connector "A" is the 14-pin connector on left side of instrument cluster as viewed from rear of instrument cluster.
If wiring is damaged, repair wiring as necessary. If wiring is okay, proceed to step 13).
Checking instrument cluster connector, using ohmmeter, check 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 10-amp fuse No. 18. Using voltmeter, check for battery voltage on pin No. 12 (Red/Yellow wire) of instrument cluster connector "A" and 10-amp fuse No. 18.
Fuse is located in fuse panel below left side of instrument panel. The instrument cluster connector "A" is the 14-pin connector on left side of instrument cluster as viewed from rear of instrument cluster. If continuity and battery voltage do not exist, repair wiring or replace fuses as necessary. If continuity and voltage exist, proceed to step 15).
Checking printed circuit continuity, check for continuity between instrument cluster printed circuit and the following wire terminals of connector "A": Dark Green/White, Orange/Yellow and Red/Yellow.
If continuity does not exist, replace defective terminals. If continuity exists, replace speedometer and repeat step 1). Adjust odometer mileage on replacement speedometer and install odometer sticker on driver-door pillar to indicate speedometer replacement.