Cruise Command Adjustments; Release Circuit Test; Automatic Speed Control Relay Test; Bellows Chain Linkage Adjustment - Jeep 1979 CJ-5 Technical & Service Manual

CRUISE COMMAND 1H-11
Condition Possible Cause
Correction
SYSTEM DISENGAGES
ON LEVEL ROAD
WITHOUT
APPLYING BRAKE
(3)
(4)
Servo linkage chain broken or
throttle clevis slipped.
Oversensitive stop lamp switch.
(3)
(4)
Repair chain or install clevis.
Replace switch or check for
binding in brake linkage.
ERRATIC OPERATION
O F CRUISE COMMAND
( 1 )
Check vacuum servo or vacuum
hose.
(1)
Replace servo or vacuum hose.
(2)
Check regulator.
(2) Replace regulator as necessary.
CRUISE COMMAND
CONTINUES TO
ACCELERATE A F T E R
ENGAGEMENT
(1)
Open circuit in green wire
attached to number 4 terminal
at regulator.
(1)
Repair open circuit in green wire.
Check for improper connection
at brake switch (crossed wires).
CAR LOSES
EXCESSIVE SPEED
ON HILLS
(1)
(2)
Excessive slack in servo chain.
Lack of engine manifold vacuum.
(1)
(2)
Refer t o Adjustments.
Move vacuum source to center of
intake manifold.
70078C
Release
Circuit Test
The release circuit is part of the stoplamp circuit. To
check the stoplamp circuit, observe the stoplamps. Stop-
lamps should light when brake pedal is depressed one-
quarter inch or more.
NOTE: If the Cruise Command is to disengage when
brakes are applied, the stoplamp circuit must not be
shorted to ground. Correct any stoplamp problem before
proceeding. Check for burned out bulbs, improper
ground connections, open or grounded circuits in the
brake release switch or wire harness.
(1) Check all harness connections for proper fit.
(2) Disconnect three-wire connector at regulator.
(3) Connect one side of test lamp to ground and
other to blue wire. Test lamp should not light. If test
lamp lights, Cruise Command wire is connected to
wrong side of stoplamp switch.
(4) Press brake pedal 1/4 inch. Test lamp should
light. If test lamp does not light, check power source
fuse, stoplamp switch, and wire harness to regulator to
locate problem.
Automatic Speed Control Relif Test
The automatic speed control relay is located close to
the fuse panel under the instrument panel.
NOTE: Check all connections prior to testing.
(1) Turn ignition switch and slide switch to ON
position.
(2) Using test lamp, ground one lead and touch
other lead to each individual connector at relay. Test
lamp should light at every wire except ground wire. If
test lamp does not light on red but lights on white and
violet connectors, replace relay. If test lamp does not
light on white and violet wires, check power source, fuse
and wire harness.
ADJUSTMENTS
i e l t e w s Chain Linkage Adjustment
NOTE: Before adjusting the bellows chain, the carbu-
retor throttle must be at idle position, ignition off and
choke valve fully open.