Test A: Integrated Circuit Display(S) Inoperative Or Erratic

Check the 10A METER fuse located in the interior fuse junction panel. Is the fuse OK? If yes, go to step 4 . If no, go to next step.
Perform system check. Turn key OFF. Replace the 10A METER fuse. Turn key ON. Inspect the fuse. Does it fail again? If yes, go to next step. If no, go to step 4 .
Check for short to ground. Turn key OFF. Replace the 10A METER fuse. Remove the instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Locate and disconnect the instrument cluster connectors. Turn key ON. Inspect the 10A METER fuse. Does the fuse fail again? If yes, service the Gray/Blue wire between the interior fuse junction panel and the instrument cluster. See WIRING DIAGRAMS . If no, go to next step.
Check instrument cluster power supply. Turn key OFF. Disconnect all of the instrument cluster connectors. Turn key ON. Measure the voltage on the Gray/Blue wire at each of the instrument cluster connectors. See WIRING DIAGRAMS . Are the voltages greater than 10 volts? If yes, go to next step. If no, service Gray/Blue wire(s) in question.
Check instrument cluster ground. Turn key OFF. Disconnect all of the instrument cluster connectors. Measure the resistance between the 10-pin instrument cluster connector Black/White wire and ground. Measure the resistance between the Black 12-pin instrument cluster connector Black/Red wire and ground. See WIRING DIAGRAMS . Are the resistance less than 5 ohms? If yes, replace instrument cluster printed circuit. See INSTRUMENT CLUSTER PRINTED CIRCUIT under REMOVAL & INSTALLATION. If no, service faulty wire and check for poor grounds.