1. Disconnect the switch wire from the combination valve.
2. Connect a jumper wire from the switch wire to ground.
3. Turn the ignition ON.

Does the BRAKE lamp light?

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System OK

Go to Step 2

1. Turn the ignition OFF.
2. Inspect the BRAKE lamp bulb.

Is the bulb OK?

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Go to Step 3

Go to Step 4

Inspect for an open in the circuit.

Did you find and correct an open?

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Go to Step 5

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Replace the bulb.

Is the repair complete?

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Go to Step 5

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Turn ON the ignition.

Does the BRAKE lamp light?

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System OK

Go to Step 1