2000 Western Star 5900 TSBs

damaged electrical harness should be repaired or replaced. Refer to the wiring section in Group 54 of the applicable workshop manual for detailed wire repair instructions. Table 1 describes general guidelines for repairing or replacing a harness. There may be cases when more than one factor determines the course of action. For example, repairing a harness is recommended if shipping times for the replacement harness exceed one week. However, replacement may be the only option if damage to the harness is too extensive. NOTE: When a harness is repaired, the source of the damage must also be identified and repaired. Table 2 is a quick-reference for specific wire and terminal conditions. IMPORTANT: Damaged connectors and seals can be replaced without replacing the harness. A drag test should be performed to make sure that the terminal can retain proper tension to the mating terminal. Refer to "Terminal Drag Test" in this bulletin for instructions. Discolored wires or melted insulation should be replaced before any other repairs are performed on the harness.

Print out the "Powernet Assessment Worksheet," found at the end of this bulletin. 2. Use the "Powernet Assessment Detail Section" to understand and master the worksheet. The detail section, starting on page 2, breaks the worksheet down step by step. 3. Perform each line of the worksheet in order, recording the initial value of each check before performing repairs. Repair issues as they are found, then recheck. Complete the entire worksheet even if the original issue seems to be resolved. 4. Once all the checks in the "Powernet Assessment Worksheet" have been completed, if a starting issue persists, use the "Troubleshooting the Starting System" section near the end of this bulletin.

CAUSED BY EVAPORATION OF DEF EXPOSED TO AIR AND/OR DAMPNESS. *PE

*JS