2-1
2-1
1
1.. EErrrro
or
r cco
od
de
e d
diissp
pllaayy
2
2.. C
Cu
up
p h
ho
olld
de
err
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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
1.3
1.3
How
How to
to cle
clean
an har
harnes
ness c
s conn
onnect
ectors
ors and
and sy
syste
stem c
m comp
ompone
onents
nts
(1)
(1) Open
Open-circ
-circuits ar
uits are ofte
e often cause
n caused by dirt
d by dirty harne
y harness
ss
connectors and components. Dust together with
connectors and components. Dust together with
greasy matter forms grime which, in time, penetrates
greasy matter forms grime which, in time, penetrates
electrical connections, resulting in
electrical connections, resulting in loose metal-to-metal
loose metal-to-metal
contact or, in the worst case, electrical separation of
contact or, in the worst case, electrical separation of
surfaces in contact. For this reason, it is essential that
surfaces in contact. For this reason, it is essential that
the connectors and components be cleaned at each
the connectors and components be cleaned at each
periodic inspection and at when servicing the truck.
periodic inspection and at when servicing the truck.
Instead of a commonly used solvent, use electronic
Instead of a commonly used solvent, use electronic
parts cleaner (in the manner illustrated on the right).
parts cleaner (in the manner illustrated on the right).
1.
1. Elect
Electronic pa
ronic parts clea
rts cleaner
ner
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1
1
Electronic parts cleaner
Electronic parts cleaner
Three Bond 29B
Three Bond 29B
Note: The cleaner liquid is volatile (evaporates by itself).
Note: The cleaner liquid is volatile (evaporates by itself).
All that is required is to throughly wash off the grime with the spray.
All that is required is to throughly wash off the grime with the spray.
No need to wipe off
No need to wipe off the sprayed liquid.
the sprayed liquid.
(2)
(2) Afte
After chec
r checking the c
king the conne
onnector fo
ctor for conti
r continuity, w
nuity, wash it as
ash it as
shown. Then, uncouple the connector and spray
shown. Then, uncouple the connector and spray
contact surface activator onto contact surfaces. Install
contact surface activator onto contact surfaces. Install
and remove the connector several times to wet the
and remove the connector several times to wet the
surfaces thoroughly with the activator liquid. After
surfaces thoroughly with the activator liquid. After
coupling up the connector, check to be sure that it
coupling up the connector, check to be sure that it is in
is in
locked state.
locked state.
1)
1) C
Con
onta
tact
ct su
surrfa
facce a
e act
ctiiva
vato
torr
1
1.. El
Elec
ectr
tron
oniic p
c par
arts
ts cl
clea
eane
nerr
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1
1)
1)
Contact surface activator
Contact surface activator
Three Bond 2501S (
Three Bond 2501S (aerosol)
aerosol)
Note: Do not spray
Note: Do not spray too much liquid into the connector.
too much liquid into the connector.
Cleaner liquid reacts differently with
Cleaner liquid reacts differently with some resins (plastic materials).
some resins (plastic materials).
Summary of Contents for FB13PNT
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