For 1990-2009 cars

### Diagnostic Aids

An intermittent malfunction may be caused by a fault in the magnetic clutch electrical circuit. Inspect the wiring harness and components for any of the following conditions:

• | Backed out terminals.

• | Improper mating of terminals.

• | Broken electrical connectors locks.

• | Improperly formed or damaged terminals

• | Faulty terminal to wire connections.

• | Physical damage to the wiring harness.

• | A broken wire inside the insulation.

• | Corrosion of electrical connections, splices, or terminals.

Repair any electrical circuit faults that were found. Refer to Wiring Repairs .

### Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

1. This step tests for proper arm movement with the magnetic clutch de-energized.

2. This step tests for proper arm movement with the magnetic clutch energized.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Cruise Control System Check performed? | -- | Go to Step 2 | Go to Cruise Control System Check
2 |

1. Disconnect the cruise control cable from the actuator.
2. Move the actuator arm back and forth.

Does the actuator arm move freely in both directions?

--

Go to Step 3

Go to Step 5

3 |

1. Disconnect the cruise control servo connector.
2. Connect a J 39200 from ground to terminal 4 of the cruise control servo.
3. Connect a J 39200 from B+ to terminal 3 of the cruise control servo.
4. Attempt to move the actuator arm.

Does the actuator arm move?

--

Go to Step 5

Go to Step 4

4 |

1. Inspect the cruise control module connector for poor terminal contact.
2. If OK, replace the cruise control module. Refer to Cruise Control Module Replacement .

Is the replacement complete?

--

Go to Step 6

--

5 |

1. Inspect the cruise control servo terminals for poor contact.
2. Inspect other wires and connectors for proper connections.
3. If no circuitry problem is found, replace the cruise control servo.

Refer to Cruise Control Servo Replacement .

Is the replacement complete?

--

Go to Step 6

--

6 | Install and connect any components removed during diagnosis. Is the repair complete? | -- | Go to Cruise Control System Check | --