Test SC-1D: Checking Speed Control Operation

WARNING: This page is about a different car, the 1998 Plymouth Breeze, 1998 Dodge Stratus, and 1998 Chrysler Cirrus. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Perform TEST SC-1A before proceeding.

Turn ignition off. Using an external ohmmeter, measure resistance on speed control power supply circuit between speed control servo connector and ground. See SPEED CONTROL SERVO CONNECTOR WIRE IDENTIFICATION table in TEST SC-1B . If resistance is 5 ohms or less, repair short to ground in speed control power supply circuit. Perform TEST SC-VER . If resistance is more than 5 ohms, go to next step.
Disconnect brake switch connector. Brake switch connector is located near top of brake pedal. Inspect brake switch connector for damaged or pushed out terminals. Repair as necessary. Perform TEST SC-VER . If wiring and connectors are okay, go to next step.

Ensure scan tool is still actuating speed control vent solenoid. Using external voltmeter, measure voltage of speed control power supply circuit between brake switch connector and ground. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION table. If voltage is 10 volts or less, go to step 5). If voltage is more than 10 volts, go to next step.

BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION

Application	Wire Color
Brake Switch Sense Circuit	White/Red
Brake Switch Ground Circuit	Black/Light Green
Speed Control Power Supply Circuit	Yellow/Pink
Switched Speed Control Power Supply Circuit	Dark Blue/Red
Brake Light Switch Output Circuit	White/Tan
Fused B+ Circuit	Red/Black

Inspect brake switch adjustment. Adjust brake switch as necessary. Perform TEST SC-VER . If brake switch adjustment is okay, replace brake switch. Perform TEST SC-VER .
Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, measure resistance of speed control power supply circuit between brake switch connector terminal No. 3 and PCM connector terminal No. 5. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION table for wire color identification. If resistance is less than 5 ohms, replace PCM. Perform TEST SC-VER . If resistance is 5 ohms or more, repair open speed control power supply circuit between brake switch connector and PCM. Perform TEST SC-VER .