Chevrolet CHEVY VAN G10 SERIES Service Manual page 306

E L E C T R IC A L -B O D Y A N D CHASSIS 12-6
Ignition Switch Replacement
(Fig. 10)
1. Raise hood and disconnect ground cable from battery.
2. Rem ove lock cylinder by positioning sw itch in" ACC"
position and inserting stiff wire in small hole in cylinder
face. Push in on wire to depress plunger and continue to
tu rn key counter-clockw ise until lock cylinder can be
removed.
3. Rem ove the m etallic ignition n u t switch.
4. Pull the ignition sw itch o u t from behind the instrum ent
panel and remove th e " th e ft resistant connector. Use a
screwdriver to unsnap the locking tangs on the connector
from their position on the switch.
5. Snap the co nn ector in to place on a new ignition switch.
6
. Place the sw itch in to position from behind the instru­
m en t panel, first adding grounding ring th en install the
ignition sw itch nut.
7. Install the lock cylinder, key inserted.
8
. Install ground cable on b attery and close hood.
INSTRUM ENT CLUSTER REPLACEMENT
(Fig. 11)
1. O pen hood and remove ground cable from battery.
2. Standing outside vehicle reach up under instrum ent
cluster and disconnect speedom eter cable by first depres­
sing tang on rear o f speedom eter head, pushing then
pulling cable free from head as tang is depressed.
3. Unplug instrum ent panel harness connector from prin ted
circuit.
4. D isconnect oil pressure line from gauge if so equipped.
5. Remove (2 ) tw o n u ts attaching instrum ent cluster studs
to lower opening in instrum ent panel.
6
. Pull top o f cluster away from instrum ent panel and lift
o ut bo tto m o f cluster.
7. Remove cluster to bench for further disassembly (lam i­
nated printed circuit, speedom eter head, gauges).
SERVICE OPERATIONS
8
INDICATO R AND IL L U M IN A T IN G BULB
REPLACEMENT (Fig. 11)
1. Reach up under in stru m en t panel and tu rn bulb holder
2. Pull bulb straight o u t to remove from holder.
3. Install replacem ent bulb in holder, press inward to lock in
4. Insert holder into housing, w ith lugs on holder entering
LA M IN A TED C IR C U IT REPLACEMENT
(Fig. 11)
1. Remove in stru m ent cluster assembly as previously de­
2. Remove all instrum ent cluster lam p bulb assemblies.
3. Remove lam inated circuit retaining screws.
SPEEDOMETER REPLACEMENT
2. Remove (4) screws retaining cluster rear cover containing
3. Remove (2 ) hex head screws and rubber grom m ets
4. To install, reverse removal procedure and check operation
SPEEDOMETER CABLE (CORE)
REPLACEMENT OR LUBRICATIO N
2.
. Install cluster in reverse order o f removal, noting th a t
clips at top o f cluster slip in to instrum ent panel opening
after b o tto m o f cluster is installed.
counter-clockw ise to remove from th e cluster housing.
place.
notches in case, and tu rn clockwise to lock holder against
p rin ted circuit.
scribed, steps 1-7.
N O T E : These screws serve as a ground fo r the
circuit and must be reinstalled to provide the proper
ground.
4. Remove fuel, tem perature and am m eter term inal nuts
retaining lam inated circuit to rear o f cluster.
5. Lift lam inated curcuit from cluster cover.
6
. T o install, reverse steps 1-5 and check electrical operatio n
o f all affected com ponents.
IMOTE: Servicing of the speedometer assembly
should be performed by an authorized AC Speed­
om eter Service Station.
1. Remove instrum ent cluster as previously described in this
section.
speedom eter.
securing speedom eter assembly to cluster cover.
o f speedom eter assembly. DO NOT K IN K SPEED­
OM ETER CABLE.
1. D isconn ect the speedom eter cable casing from the
sp eedom eter head by first depressing a tong on rear
o f speedom eter head, pushing in then pulling casing
free from the head as the tong is depressed.
R em ove old core by pulling it out at the end o f the
speedom eter cable casing.
C H E V Y V A N SH O P M A N U A L