Chevrolet 1977 light duty truck, Service Manual

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ON-VEHICLE SERVICE
/ T “X
FUSIBLE LINK
t
CONNECTOR
\
^ j
THOROUGHLY TAPE ALL J u j H
EXPOSED WIRES
CONNECTOR CR1 MPEI
d
( |
AND SOLDERED
Fig. 8 - 5 5 - F u s ib le L in k R e p l a c e m e n t
C O M P O N EN T PART
REPLACEMENT
Fusible Link Replacem ent (Fig. 8 -5 5 )
A new fusible link can be installed, a fte r the short
circuit is located and repaired, as follows:
1. Disconnect battery ground cable.
2. Disconnect fusible link from junction block or
starter solenoid.
3. Cut harness directly behind connector to remove
d a m a g e d fusible link (fig. 8-54).
4. Strip harness wire approxim ately 1/2".
5. Position clip a ro u n d new fusible link and
harness wire, crim p so th at all wires are securely
fastened.
6. Solder connection using rosin core solder. Use
sufficient heat to o b ta in a good solder joint.
7. T ap e all exposed wires with plastic electrical
tape to prevent corrosion and shorting.
8. Connect fusible link to junction block or starter
solenoid.
9. Connect battery ground cable.
H E A D L A M P S W A R N IN G B U ZZER
R eplacem ent (Fig. 8 -5 6 )
1. D isc o n n e c t electrical c o n n e c to r fro m LPS
(Lam ps) socket o f fuse panel.
2. D isc o n n e c t electrical co n n ecto r from I G N
(Ignition) socket o f fuse panel.
F ig . 8 5 6 - H e a ld a m p W a r n i n g B u z z e r
3. Disconnect electrical connector to isntrum ent
panel harness.
4. Remove strap securing buzzer to instrum ent
panel harness.
5. Install replacem ent h e ad lam p w arn in g buzzer in
reverse wequence o f removal.
SEAT BELT W A R N IN G SYSTEM
All C-K type light duty trucks have a non-sequential
timer controlled seat belt w arning system. This system
has an instrum ent panel w arn in g light
that will
illuminate every time the ignition switch is turned on,
w hether or not the d riv e r’s seat belt is buckled, but will
automatically go off after 4-8 seconds. The buzzer is also
controlled by the 4-8 second timer, but will operate only
if the driver has not buckled-up p rio r to turning on the
ignition. If no attem pt is m ade to buckle-up after turning
on the ignition, the buzzer will also shut-off au to m ati­
cally after 4-8 seconds.
A trouble shooting diagnostic chart and wiring
schematic are shown in Figures 8-57 and 8-58.