Test E: Speedometer/Odometer Inoperative

NOTE: Instrument cluster connector C266B must remain connected.

Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. With ignition switch in OFF position, connect a voltmeter between "S" terminal and "G" terminal on speedometer (back of instrument cluster). Place voltmeter in AC volts position. Drive vehicle and note speed to voltage readings. Compare noted readings to SPEED-TO-VOLTAGE COMPARISON table. If voltage readings are correct, replace speedometer. If readings are not correct, go to next step.

SPEED-TO-VOLTAGE COMPARISON

Speed - MPH (KM/H)	Approximate Voltage
0 (0)	0
5 (8)	0.5
10 (16)	1.0
15 (24)	1.6
20 (32)	2.0
25 (40)	2.4
30 (48)	2.8
35 (56)	3.1
40 (64)	3.4
45 (72)	3.6
50 (80)	3.9
55 (88)	4.2
60 (96)	4.4

With ignition switch in OFF position, ensure the 4 screws holding speedometer to instrument cluster printed circuit are securely fastened. Measure resistance between speedometer "S" terminal and instrument cluster connector C266B terminal No. 3 (Pink/Blue wire), speedometer "G" terminal and instrument cluster connector C266B terminal No. 5 (Black/Red wire), and speedometer "B" terminal and instrument cluster connector C266B terminal No. 2 (Blue wire). See Figure. If resistances are less than 5 ohms, go to next step. If resistances are more than 5 ohms, replace instrument cluster printed circuit. See PRINTED CIRCUIT under REMOVAL & INSTALLATION.
With ignition switch in OFF position and instrument cluster still removed, disconnect instrument cluster connector C266B. Disconnect Vehicle Speed Sensor (VSS) connector. VSS is located in center of engine compartment. Measure resistance of Pink/Blue wire between VSS connector and instrument cluster connector C266B terminal No. 3. Measure resistance between ground and instrument cluster connector C266B terminal No. 3 (Pink/Blue wire). Measure resistance of Black/Red wire between VSS connector and instrument cluster connector C266B terminal No. 5. If resistances are less than 5 ohms between instrument cluster and VSS, and more than 10 k/ohms between Pink/Blue wire at instrument cluster and ground, replace VSS. If resistances are more than 5 ohms between instrument cluster and VSS, and less than 10 k/ohms between Pink/Blue wire at instrument cluster and ground, service wire(s) in question.