6–110 Copyright © 1998 General Motors Corp.
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
B. Code 63 26
1. Inspect kickdown switch.
C. Code 63 40
1. Inspect service brake status switch.
2. Use the DDR to identify the two wires associated with the input functions for Pump/Pack Enable
and Automatic Neutral For Refuse Packer. Inspect the input wiring, connectors, and switches to
determine why the input states are different. Correct problems which are found. There is further
information on these input functions on Pages P–25, P–26, P–29, and P–30.
CODE 63 XX — INPUT FUNCTION FAULT
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