TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the CAB connector.
Note: Check connector - Clean/repair as necessary.
Start the engine.
Raise engine speed above 1,800 RPM’s
Measure the voltage between Fused Ignition Switch Output (RUN) circuit and
ground.
Is the voltage above 16.5 volts ?
All
Yes → Refer to appropriate service information for Charging System
testing and repair.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 4
4 Turn the ignition off.
Disconnect the CAB connector.
Note: Check connector - Clean/repair as necessary.
Inspect the CAB and CAB harness connector for damage.
Is there any broken, bent, pushed out, corroded, or spread terminals?
All
Yes → Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 5
5 Turn the ignition off.
Disconnect the CAB connector.
Note: Check connector - Clean/repair as necessary.
Using a 12-volt test light connected to 12-volts, probe the Ground circuits.
Does the test light illuminate?
All
Yes → Go To 6
No → Repair the Ground circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Reconnect the CAB harness connector.
Turn the ignition on.
With the DRBIIIt in Sensors, read the ignition voltage.
Does the DRBIIIt display ignition voltage above 16 volts?
All
Yes → Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 7
29
BRAKES (CAB)
SYSTEM OVER VOLTAGE — Continued
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