Chrysler PT Cruiser 2001 Service Manual Supplement page 2606

DRIVEABILITY - GAS
P0703-BRAKE SWITCH SENSE CIRCUIT —
TEST
4 Turn the ignition off.
Disconnect the Brake Lamp Switch harness connector.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the Brake Lamp Switch Sense circuit.
Is the resistance above 100 kohms?
Yes → Go To 5
→ Repair the Brake Lamp Switch Sense circuit for a short to ground.
No
5 If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
All
All