1. Measure resistance between plugs on cables and pins on
jacks of EXTERNAL COMMUNICATION BOX A11 as
W111 plug P1 (1) and pin of jack J115 (5)
W112 plug P1 (2) and pin of jack J116 (6)
W113 plug P1 (3) and pin of jack J117 (7)
W114 plug P1 (4) and pin of jack J118 (8)
2. Does multimeter read 0 ohms for each measurement?
1. Verify no faults found.
1. Replace cables W111, W112,
W113, and/or W114
2. Verify no faults found.