For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Cruise Control Schematics DEFINITION: This table diagnoses that the cruise control system operates normally, but the main cruise control switch indicator located in the main cruise control switch does not illuminate when the switch is depressed.
1 | Did you review the Cruise Control Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Cruise Control
2 | Verify that the cruise control system is operational and that the main cruise control switch indicator lamp does not illuminate when the switch is depressed. Does the main cruise control switch indicator lamp operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 |

1. Turn the ignition OFF.
2. Disconnect the cruise control servo connector.
3. Connect a 5 A fused jumper wire between cavity 10 of the cruise control servo connector and a good ground.
4. Turn ON the ignition with the engine OFF.

Does the cruise control indicator lamp in the main cruise control switch illuminate?

Go to Step 5

Go to Step 4

4 | With the cruise control servo connector still disconnected:

1. Disconnect the main cruise control switch connector. Refer to Cruise Control Switch Replacement for access.
2. Test for an open condition in the indicator control circuit between the cruise control servo connector and the main cruise control switch connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 6

5 | Inspect for poor connections at the harness connector of the cruise control servo. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7
6 | Inspect for poor connections at the harness connector of the main cruise control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8
7 | Replace the cruise control servo. Refer to Cruise Control Servo Replacement . Did you complete the replacement? | Go to Step 9 | --
8 | Replace the main cruise control switch. Refer to Cruise Control Switch Replacement . Did you complete the replacement? | Go to Step 9 | --
9 | Operate the system in order to verify the repair. Did you correct the condition? | Go to Step 9 | --