Test H: Coolant Temperature Gage Is Inaccurate

Disconnect connector to the Coolant Temperature Sender. Connect one red clip lead of the J33431 Tester to the harness connector DK GRN/WHT wire and the other red clip lead to ground. Adjust the resistance dials of the tester to 1500 ohms and then to 55 ohms. The Coolant Temperature Gage should show C and then H.
^ If the Coolant Temperature Gage responds correctly, replace the Coolant Temperature Sender.
^ If the gage does not respond correctly, check the DK GRN/WHT (135) wire. If OK, replace the Instrument Cluster.