Printed Circuit Board Replacement - Jeep J-10 Series 1982 Technical & Service Manual

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Coolant Temperature Gauge—CJ Vehicles
(1) Remove cluster.
(2) Carefully uncrimp lip of outer bezel. Remove
outer bezel, glass and glass retaining bezel.
(3) Remove attaching screws from speedometer
housing. Remove speedometer and face plate assembly.
(4) Remove attaching nuts and remove insulator
and coolant temperature gauge.
NOTE: It may be necessary to carefully move lamp
guard aside.
(5) Install replacement gauge, insulator and attach
ing nuts. Place toothed lockwasher on S-terminal. En
sure gauge is properly centered in face plate opening,
then tighten nuts.
(6) Inspect all lamp guards for correct position. In
stall speedometer and face plate assembly. Install at
taching screws and washers.
(7) Examine glass for fingerprints and debris.
Clean as necessary.
(8) Install glass, glass retaining bezel and outer be
zel. Crimp outer bezel four places.
(9) Install cluster.
(10) Start engine and observe coolant temperature
gauge for proper operation.
Coolant Temperature Gauge—Cherokee-Wagoneer-Truck
Vehicles
(1) Remove cluster.
(2) Remove printed circuit board and gauge assem
bly from bezel.
(3) Remove mask from fuel gauge and coolant tem
perature gauge.
CAUTION: Use care to prevent scratching paint on
mask.
(4) Remove attaching nuts and remove coolant tem
perature gauge.
. (5) Install replacement gauge and tighten nuts.
(6) Install mask and screws.
(7) Install printed circuit board and gauge assembly
on bezel.
(8) Install cluster.
(9) Start engine and observe coolant temperature
gauge for proper operation.
PRINTED CIRCUIT BOARD REPLACEMENT
Only Cherokee, Wagoneer and Truck vehicles are
equipped with a printed circuit board. CJ vehicles have
conventional wiring for all gauges, meters and cluster
illumination lamps.
ENGINE INSTRUMENTATION 1L-7
Removal
(1) Remove instrument cluster.
(2) Remove radio noise suppressor (connector strip
if not equipped with radio).
(3) Remove all illumination lamps from cluster.
Turn counterclockwise to remove.
(4) Remove printed circuit board and gauge/meter
assembly.
(5) Remove retaining nuts from ammeter and oil
pressure gauge.
(6) Lift ammeter, oil pressure gauge and plate out
of cluster as assembly.
(7) Remove retaining nuts from fuel and coolant
temperature gauges. Remove large ground screw from
printed circuit board above speedometer.
(8) Remove speedometer, fuel gauge, and coolant
temperature gauge as assembly.
Installation
(1) Install printed circuit board. Ensure blue illumi
nation lamp diffusers are correctly positioned. Install
ground screw and gauge retaining nuts.
(2) Install ammeter and oil pressure gauge assem
bly on circuit board. Ensure blue lamp diffuser is cor
rectly positioned. Install retaining nuts. Stamped nuts
are used for oil pressure gauge. Plain nuts and lock
washers are used for ammeter. Ensure ammeter wire
terminal nuts are properly tightened, otherwise elec
trical failure will result.
(3) Examine gauge lenses for fingerprints and
debris. Clean as necessary.
(4) Install printed circuit board and gauge assembly
on bezel.
(5) Install illumination lamps.
(6) Install radionoise suppressor or connectorstrip.
(7) Install cluster.
(8) Start engine and observe all gauge, meters and
lamps for proper operation.
CONSTANT VOLTAGE REGULATOR (CVR) REPLACEMENT
CJ Vehicles
The CVR is contained in the fuel gauge housing. If the
CVR is defective, replace the fuel gauge. Refer to Fuel
Gauge Replacement.
Cherokee-Wagoneer-Truck Vehlcies
The CVR is contained in the coolant temperature
gauge housing. If the CVR is defective, replace the cool
ant temperature gauge. Refer to Coolant Temperature
Gauge Replacement.