Ignition "ON" & Engine "OFF".

Disconnect ECM connector.

Jump terminal 24 of ECM harness connector and chassis ground with jumper wire.

Is the Cruise control indication lamp turned ON ?

YES

▶ Go to "Check bulb" as below.

NO

▶ Check for open or short in signal harness.

Repair as necessary and go to "Verification vehicle Repair" procedure.

Ignition "OFF" & Engine "OFF".

Remove Instrument Panel and then remove bulb from instrument panel.

Apply 12 voltage to the bulb and check that bulb is turned ON.

Is the bulb turned ON ?

YES

▶ Substitute with a known-good ECM and check for proper operation.

If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.

NO

▶ Substitute with a known-good bulb and check for proper operation.

If the problem is corrected, replace bulb and then go to "Verification of Vehicle Repair" procedure.