Chevrolet 70 1969 Series, Shop Manual

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C H ASSIS ELECTRICAL A N D INSTRUMENTS 12-2
IM P O R T A N T : If an overload or some other
condition destroys the link, locate and correct the
cause of trouble, then replace the link with a wire
of the same gauge size and length.
MAINTENANCE A N D REPAIR
All electrical connections must be kept clean
and tight. Loose or corroded connections will cause
a discharged battery, difficult starting, dim lights,
and possible damage to generator and regulator.
Wires must be replaced if insulation becomes
burned, cracked, or deteriorated.
Whenever it is necessary to splice a wire or
repair one that is broken, always use solder to
bond the splice. Always use rosin flux solder on
electrical connections. Use insulating tape to cover
all splices or bare wires.
When replacing wires, it is important that the
correct size as indicated on wiring diagrams be
used. C A U T IO N : Never replace a wire with one of
a smaller size. Each harness or wire must be held
securely in place by clips or other holding devices
to prevent chafing or wearing away the insulation
due to vibration.
By referring to the wiring diagrams, circuits
may be tested for continuous circuit or shorts with
a conventional test lamp or low reading voltmeter.
Figure 7 —
Replacing Blade Type Connector Terminals
R E P L A C IN G WIRING C O N N E C T O R T E R M IN A L S
Either blade type or twin lock type terminals
Figure 2 — Removing Twin-Lock Connector Terminals
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Figure 3—Chassis Junctions (Conv. Cab Models) (Typical)
are used in the wiring harness connectors. Mating
ends of the connectors are secured by tang locks
which must be disengaged at the same time to sep­
arate the connector.
Terminal Removal
1. To remove a blade type terminal from the
connector, disengage lock tangs and separate con­
nector. Insert a thin-bladed instrument under mat­
ing end of connector terminal and pry up on term­
inal being careful not to damage connector. Pull
wire and terminal from connector as shown in
figure 1.
2. To remove a twin lock type terminal from
connector, disengage the lock tangs and separate
connector. Insert terminal remover (J-21091) or
equivalent, as shown in figure 2 to disengage term­
inal locks from the connector. Pull wire and term­
inal from cable connector.
Terminal Installation
N O T E : If original terminals are to be used,
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M ANUAL