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TEST ACTION APPLICABILITY 4 Turn the ignition off. 9LOW9 range. Depress the Axle Lock Switch once. All Yes → Replace the Rear Locker Relay. Perform BODY VERIFICATION TEST - VER 1. No → Go To 5 5 Measure the resistance of the Rear Locker Relay Output circuit between the PDC All Yes → Repair the Rear Locker Relay Output circuit for an open. Perform BODY VERIFICATION TEST - VER 1. No → Go To 6 6 Turn the ignition off. All Yes → Repair the Rear Locker Pump Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. No → Go To 7 7 Turn the ignition on. 9LOW9 range. Depress the Axle Lock Switch once. All Yes → Go To 8 No → Refer to Differential/Driveline for the related symptom(s). Perform BODY VERIFICATION TEST - VER 1. 8 Turn the ignition off. All Yes → Repair the Rear Locker Indicator Switch Sense circuit for an open. No → Go To 9 43 BRAKES (CAB) *REAR AXLE LOCK INDICATOR REMAINS FLASHING — Continued |