TEST
ACTION
APPLICABILITY
5
Disconnect the PCM harness connectors.
Measure the resistance of the (K29) Brake Lamp Switch Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the open in the (K29) Brake Lamp Switch Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
6
Measure the resistance between ground and the (K29) Brake Lamp Switch Signal
circuit.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K29) Brake Lamp Switch
Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
No
→ Go To 7
7
Connect the PCM harness connectors.
Connect the Brake Lamp Switch harness connector.
Brake pedal must be depressed in the next step.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, probe the (K29) Brake Lamp Switch
Signal circuit at the Brake Lamp Switch harness connector.
Is the test light illuminated and bright?
All
Yes
→ Go To 8
No
→ Replace or adjust the brake switch.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
8
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 per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
187
DRIVEABILITY - GAS
*BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRBIII
t —
Continued