32—ELECTRICAL SYSTEM
CHRYSLER SERVICE MANUAL
Item 2—If gauge hand does not swing across
dial in Test 2, there is an open circuit in wire
between dash unit and engine unit, dash unit
is defective, or no power is reaching dash unit.
Test further by grounding "GA" terminal on
dash unit and turning on ignition switch. If
gauge hand now moves, replace wire. If gauge
hand still does not move, connect 12-volt test
lamp from dash unit ignition terminal to
ground. Turn on ignition switch. The test lamp
should light. If test lamp lights, replace dash
unit. But, if test lamp does not light, test wire
between ignition switch and dash unit by con-
necting test lamp to "Accessory" terminal at
ignition switch and to ground. When this is
done, test lamp should light.
Item
3—If
gauge hand operates correctly in
Test 1 and Test 2, but gauge does not indicate
temperature changes correctly, engine unit is
defective, or dash unit is not calibrated proper-
ly. Use an engine unit that is in good condition.
Then, if gauge is still not accurate, replace
dash unit.
Item 4—If gauge hand is at right hand stop
pin (maximum) at all times, and Test 1 and
Test 2 indicate that wiring and dash unit are
in good condition, the engine unit is defective.
Install new engine unit. If gauge hand will not
move, dash unit is damaged or incorrectly in-
stalled. Install unit correctly, or replace as
necessary.
56.
TESTING THE OIL PRESSURE GAUGE
Test oil pressure gauge by hooking up an ac-
curate gauge and comparing readings. The
hook up can be made by using "Tee" fitting at
flexible hose connection. Warm up engine and
compare readings for idle and normal driving
pressures.
Be sure that oil level is checked before mak-
ing this check. An oil gauge pointer that flut-
ters is usually an indication that oil has en-
tered oil tube connecting gauge to engine block.
The tube should have air in it to cushion pul-
sations of oil pump and oil relief valve. The
fluttering pointer may be result of leak in oil
gauge tube or due to improper installation. To
correct this condition, disconnect tubing at
gauge and engine block and drain out oil. Con-
nect tubing at gauge first and then at block.
Test for possible plugging by breaking con-
nection at gauge. Hold gauge end of line over
an empty, clean container and start engine. The
oil should flow at a steady rate. If it does not
flow steadily, tube may be kinked or plugged.
Check y
32
inch hole in gauge tube nipple in
block. If it is plugged, this hole can be cleaned
with a fine pin.
If oil lines are open and gauge does not op-
erate, small hole leading into tube may be
plugged. The hole can also be cleaned out with
a pin.
57.
SPEEDOMETER
When speedometer fails to indicate speed or
mileage, cable or housing is probably broken.
a. Speedometer Cable
Most cables are broken due to lack of lubrica-
tion, a sharp bend or kink in housing. A cable
may break if speedometer head mechanism
binds.
If such is the case, speedometer head
should be repaired or replaced before new cable
or housing is installed.
A "jumpy" pointer condition (together with
a sort of scraping noise) is due, in most in-
stances, to dry or kinked speedometer cable.
The kinked cable rubs on housing and winds
up,
slowing down pointer. The cable then un-
winds and the pointer "jumps". To check for
kinks,
remove cable, lay it on flat surface, and
twist one end with fingers. If it turns over
smoothly, the cable is not kinked. But, if part
of cable flops over as it is twisted, cable is
kinked and should be replaced.
b.
Lubricating Speedometer Cable
The speedometer cable should be lubricated
with MOPAR All-Weather Speedometer Cable
Lubricant every 10,000 miles. At the same time,
put in a few drops of MOPAR Speedometer Oil
on wick in speedometer head. Refer to Section
XV, "Lubrication."
Fill ferrule on upper end of housing with
MOPAR Speedometer Cable Lubricant. Insert
cable in housing, starting at upper end. Turn
cable around carefully while feeding it into
housing. Repeat filling ferrule except for last
six inches of cable. Too much lubricant at this
point may cause lubricant to work into indicat-
ing head.
MyMopar.com
To Next Page
Loading...
