Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
(1) Disconnect 24 vdc cable from
(2) Set multimeter select switch to
(3) Is continuity measured between
24 vdc cable, pins D and L, and a
known good ground?
(a) If there is no continuity, repair
24 vdc cable (Para 4-31)
or replace 24 vdc cable
(b) If there is continuity, repair wire
1435 (see schematic, Fig FO-1.1)
or replace trailer main wire
harness (Para 4-30.1).
(4) Connect 24 vdc cable to connector