(1) Set multimeter select switch to ohms.
(2) Is there continuity between relay R1,
terminal 86 and a known good
(a) If there is no continuity, repair
wire 1435 (see schematic
Fig 2-31) or notify DS
(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 volts
(2) Connect positive (+) multimeter lead
to wire 1017 at headlight relay R1,
(3) Connect negative () multimeter lead
to a known good ground.
(4) Turn ON ENGINE switch
(a) If 10 to 14 vdc are not present,
turn OFF ENGINE switch
and replace headlights relay R1
(b) If 10 to 14 vdc are present,
headlights relay R1 is OK.
(5) Turn OFF ENGINE switch.
Relay tests must be performed with relay