Printed Circuit Replacement; Constant Voltage Regulator (Cvr) Replacement - Jeep 1979 CJ-5 Technical & Service Manual

1L-6 POWER PLANT INSTRUMENTATION
NOTE: It is possible to drive vehicle with tachometer
removed. Connect harness wires to each other where
tachometer was originally connected.
(4) Install tachometer, cup and screw.
(5) Connect wires.
Tomperatun Gauge
CJ Models
(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 temperature gauge.
NOTE: It may be necessary to carefully pry light guard
aside.
(5) Install gauge, insulator and attaching nuts.
Toothed lockwasher goes on S-terminal. Be sure gauge is
properly centered in face plate opening, then tighten
nuts.
(6) Check all light guards for position. Install speed-
ometer and face plate assembly. Install attaching screws
and washers.
(7) Check glass for fingerprints and debris.
(8) Install glass, glass retaining bezel and outer be-
zel. Crimp outer bezel four places.
(9) Install cluster.
Cherokee-Wagoneer-Truck Models
(1) Remove cluster.
(2) Remove
printed circuit board and gauge
assembly.
(3) Remove mask from fuel gauge and temperature
gauge.
CAUTION: Be careful to not scratch paint on mask.
(4) Remove attaching nuts and remove temperature
gauge.
(5) Install temperature gauge and tighten nuts.
(6) Install mask and screws.
(7) Install circuit board and gauge assembly to
bezel.
(8) Install cluster.
Voltmeter
(1) Disconnect illumination lamp and wire con-
nectors. Note wire locations for installation.
(2) Remove retaining nuts and bracket behind in-
strument panel.
(3) Remove gauge from instrument panel.
(4) Position gauge in instrument panel opening.
(5) Install bracket and nuts.
(6) Connect wires in original locations and install
lamp.
PRINTED CIRCUIT REPLACEMENT
Only Cherokee, Wagoneer and Truck models use a
circuit board. CJ models use direct wiring for all gauges
and cluster lamps.
Removal
(1) Remove instrument cluster.
(2) Remove radio noise suppressor (connector strip
when not equipped with radio).
(3) Remove all lamps from cluster. Twist counter-
clockwise to remove.
(4) Remove circuit board and gauge assembly.
(5) Remove retaining nuts from ammeter and oil
pressure gauges.
(6) Lift ammeter, oil pressure gauge and plate out
of cluster as assembly.
(7) Remove retaining nuts from fuel and temper-
ature gauges. Remove large ground screw from circuit
board above speedometer.
(8) Remove speedometer, fuel gauge, and temper-
ature gauge as assembly.
Installation
(1) Install circuit board to speedometer and gauge
asssembly. Check position of blue illumination lamp
diffusers. Install ground screw and gauge retaining
nuts.,
(2) Install ammeter and oil pressure gauge assem-
bly to circuit board. Check position of blue diffuser.
Install retaining nuts. Stamped nuts are used on oil
gauge. Plain nuts and lockwashers are used on ammeter.
(3) Check gauge lenses for fingerprints and debris.
(4) Install circuit board and gauge assembly to
bezel.
(5) Install lamps.
(6) Install radio noise suppressor or connector strip.
(7) Install cluster.
CONSTANT VOLTAGE REGULATOR (CVR) REPLACEMENT
CJ Models
The CVR is contained in the fuel gauge case. If CVR is
defective, replace fuel gauge.
Clerokee-Wagoieer-Truik Models
The CVR is contained in the temperature gauge case.
If CVR is defective, replace temperature gauge.