RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C (2002)
Brake Light Switch: Testing and Inspection
Fig.1 Brake Lamp Switch Terminal Identification
The brake lamp switch can be tested with an ohmmeter. The ohmmeter is used to check continuity between the pin terminals.
Switch Circuit Identification
Terminals 1 and 2:
Brake lamp circuit
Terminals 3 and 4:
RWAL/ABS module and Powertrain Control Module (PCM) circuit
Terminals 5 and 6:
Speed control circuit
Switch Continuity Test
NOTE: Disconnect switch harness before testing switch continuity.
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With switch plunger extended, attach test leads to pins 1 and 2. Replace switch if meter indicates no continuity.
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With switch plunger retracted, attach test leads to pins 3 and 4. Replace switch if meter indicates no continuity.
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With switch plunger retracted, attach test leads to pins 5 and 6. Replace switch if meter indicates no continuity.