Speed Control Switch
- Disconnect 4-wire connector at steering column. Connect a 12-volt positive source to Yellow wire terminal in connector going to speed control switch. With switch in "ON" position, connect a test lamp between Brn/Red terminal and ground. Lamp should light and then go out when speed set button is depressed. See Fig 1.
Courtesy of DAIMLERCHRYSLER CORP.
- Move test lamp lead to Dk. Blue wire terminal. Lamp should light with switch in "ON" position and go out when switch is moved to "OFF" position. With switch in "ON" position, move test lamp lead to White/Red wire terminal. Lamp should light when speed set button is depressed or switch moved to "RESUME" position.
- If switch does not operate properly in all tests, replace it. If switch operates properly in all tests, complete brake switch and servo unit tests.