1. Cycle the park brake switch.
2. Observe the actuator for movement.

Does the actuator extend normally?

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Go to Step 2

Go to Park Brake Pressure Sensor Circuit Check

Check the park brake for proper adjustment. Refer to Park Brake Cable Service/Adjustment .

Is adjustment within specifications?

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Go to Step 3

Go to Step 5

1. Disconnect and remove the park brake linkage travel switch from the actuator.
2. Connect a DMM across the park brake linkage travel switch terminals.
3. Measure the resistance.

Is the resistance more than the stated value?

1 ohms

Go to Step 6

Go to Step 4

Replace the park brake linkage travel switch. Refer to Park Brake Travel Switch Replacement .

Is the repair complete?

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System OK

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Adjust the park brake. Refer to Park Brake Cable Service/Adjustment .

Is adjustment within specifications?

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Go to Step 6

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1. Disconnect the park brake control module connector.
2. Connect a DMM from the park brake linkage travel switch terminal A to park brake control module terminal A6.
3. Measure resistance.

Is the resistance less than the stated value?

5 ohms

Go to Step 7

Go to Step 10

1. Connect a DMM from the park brake linkage travel switch terminal B to chassis ground.
2. Measure resistance.

Is the resistance less than the stated value?

5 ohms

Go to Step 8

Go to Step 9

Replace the park brake control module. Refer to Park Brake Control Module Replacement .

Is the repair complete?

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System OK

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Locate and repair open in CKT 150 (BLK) between the park brake linkage travel switch and S219.

Is the repair complete?

--

System OK

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Locate and repair open in CKT 1935 (TAN) between the park brake linkage travel switch and the park brake control module.

Is the repair complete?

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System OK

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