(1) Set multimeter select switch to ohms.
(2) Is there continuity on wire 1435
between relay R6, terminal 86 and a
known good ground?
(a) If there is no continuity, repair
wire 1435 (schematic Fig 2-30).
(b) If there is continuity, wire 1435
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.
Circuit breakers CB5, CB6, CB12, CB20, CB22, CB23 and relays R3, R13 - R19, R26, R28, R32, R33
are always electrically hot and can cause severe injury to personnel. Care must be exercised when
working under the electrical circuit board cover.
(1) Set multimeter select switch to
(2) Connect positive (+) multimeter
lead to wire 1029 at beacon relay
R6, terminal 87.
(3) Connect negative () multimeter
lead to a known good ground.
(4) Turn ON ENGINE switch
(5) Turn on beacon light switch.
(a) If 10 to 14 vdc are not present,
perform Steps (6) through (8)
below and replace
relay R6 (Para 7-95).
(b) If 10 to 14 vdc are present,
perform Steps (6) and (7) below
and repair wire 1029 (see
schematic Fig 2-30) or notify DS
(6) Turn off beacon light switch.
(7) Turn OFF ENGINE switch.
(8) Push relay R6 completely in to
(9) Install two ECB panels and 15
Relay tests must be performed with relay
The use of an insulated jumperwire
may be required to perform voltage test.