TM 5-3805-262-20
TESTING
NOTE
T e s t i n g c o n s i s t s o f o p e r a t i n g c a b c o n s o l e w i r i n g h a r n e s s c i r c u i t s as
shown in figure FO-3. The wiring harness is okay if accessories operate
normally. If necessary, you may test individual wires for continuity by
energizing the corresponding circuit shown in figure FO-3 and checking
f o r v o l t a g e u s i n g m u l t i m e t e r o r t e s t l i g h t . T o t e s t f o r s h o r t e d or
g r o u n d e d w i r e , y o u m u s t d i s c o n n e c t b o t h e n d s o f w i r e u n d e r t e s t as
f o l l o w s.
(1)
( 2)
(3)
( 4)
(5)
(6)
At cab switch panel, tag and disconnect cab console wiring harness termi-
nals (page 10-48).
At cab lower
w i t h f i n g e rs
At cab wall,
open tabs at
wiring harness, tag and disconnect terminals by grasping
and firmly pulling apart.
grasp cab console wiring harness connector with fingers, pry
top and bottom of connector, and firmly pull connector from
cab upper wiring harness connector.
Connect multimeter between ends of wire under test and check multimeter
for continuity indication. If multimeter does not indicate continuity,
repair wire or connector.
Connect multimeter between either end of wire under test and good vehicle
ground. Check multimeter for no continuity (open circuit) indication. If
multimeter indicates continuity, repair chafed or cut wire insulation.
Identify harness wires adjacent to wire under test. Connect multimeter
between either end of wire under test and each adjacent wire. Check mul-
t i m e t e r f o r n o c o n t i n u i t y ( o p e n c i r c u i t ) i n d i c a t i o n f o r e a c h t e s t . If
multimeter indicates continuity, repair chafed or cut wire insulation.
5-191
