TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the PCM harness connectors.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K29) Brake Switch Signal circuit from the Brake
Lamp Switch harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes → Go To 4
No → Repair the open in the (K29) Brake Switch Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
4 Measure the resistance between the (Z2) Ground circuit and ground at the Brake
Lamp Switch harness connector.
Is the resistance below 5.0 ohms?
All
Yes → Go To 5
No → Repair the open in the (Z1) Ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
5 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
215
DRIVEABILITY - NGC
P0573-BRAKE SWITCH #1 CIRCUIT HIGH — Continued
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