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 diode assembly from
diode assembly connector.
(2) Set multimeter select switch to OHMS.
assembly connector, terminal 1 and
rear junction box terminal, wire 1003C?
(a) If there is no continuity, repair
wire 1003C (see schematic,
Fig FO-1.1) or replace trailer main
wire harness (Para 4-30.1)
(b) If there is continuity, perform (5)
below and replace diode assembly
(4) Connect diode assembly to diode
(5) Install rear junction box cover.