00-30
4.1.4 How to clean harness connectors and sys-
tem components
(1) Open-circuits are often caused by dirty harness
connectors and components. Dust, together with
greasy matter, forms grime which, in time, pene-
trates electrical connections, resulting in loose
metal-to-metal contact or, for worse, electrical sep-
aration of surfaces in contact. For this reason, it is
essential that the connectors and components be
cleaned at each periodic inspection and when ser-
vicing the truck. Instead of a commonly used sol-
vent, use the electronic parts cleaner (in the
manner illustrated on the right).
NOTE
• The cleaner liquid is volatile. All you have to do
is just give a strong spray to wash off grime.
No need to wipe off the sprayed liquid.
(2) After checking the connector for continuity, wash it
as shown. Then, uncouple the connector and
spray the contact surface activator onto contact
surfaces.
Install and remove the connector several times to
wet the surfaces thoroughly with the activator
liquid.
After coupling up the connector, check to be sure
that it is in locked state.
*: Products contained in Terminal Maintenance kit
(SE000003)
NOTE
• Do not spray too much liquid into the connector.
Cleaner liquid reacts differently with some res-
ins (plastic materials).
Electronic parts
cleaner
Three Bond 29D or
Pow-R-Wash CZ*
Electronic parts cleaner
212347
Contact surface
activator
Three Bond 2501S (aerosol)
or Nyogel 760G*
Electronic parts
cleaner
Contact surface
activator
212348
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