Jeep 1996 Grand Cherokee Service Manual - page 352
(3) Turn speed control switch to ON position.
(4) Check for battery voltage at pin–3 of wiring
harness 4–way connector (Fig. 3). This is the 12 volt
feed from the stoplamp switch. When the brake pedal
is depressed, voltage should not be present at pin–3.
If voltage is not present with brake pedal not
depressed, check for continuity between servo and
stop lamp switch. Also check stop lamp switch
adjustment. Refer to Group 5, Brakes for procedures.
(5) Connect a small gauge jumper wire between
the disconnected servo harness 4–way connector
pin–3, and pin–3 on the servo. Check for battery volt-
age at pins–1, 2 and 4 of the servo. If battery voltage
is not at these pins, replace the servo.
(6) Turn ignition switch to OFF position. Check for
continuity
between
disconnected
servo
harness
4–way connector pin–4 and a good ground. There
should be continuity. If not OK, repair open circuit to
ground as required.
POWERTRAIN CONTROL MODULE (PCM)
For complete PCM diagnosis on the speed control
system, refer to the DRB scan tool and the appropri-
ate Powertrain Diagnostic Procedures manual.
REMOVAL AND INSTALLATION
SPEED CONTROL SERVO
4.0L ENGINES—REMOVAL/INSTALLATION
(1) Disconnect vacuum hose at servo.
(2) Unplug electrical connector at servo.
(3) Remove 2 nuts holding servo cable sleeve.
(4) Pull speed control cable sleeve away from servo
to expose cable retaining clip.
(5) Remove clip attaching cable to servo.
(6) Remove servo from mounting bracket.
(7) Reverse removal procedures to install. Block
throttle to full open position to align hole in cable
connector with hole in servo pin and install retaining
clip. Tighten servo mounting nuts to 8.5 N·m (75 in.
lbs.).
CAUTION:
The cable sleeve must be installed on
the OUTSIDE face of the bracket to avoid possible
binding of the cable.
5.2L ENGINES—REMOVAL/INSTALLATION
(1) Disconnect vacuum hose at servo.
(2) Unplug electrical connector at servo.
(3) Remove 2 nuts from servo mounting bracket.
(4) Remove and discard push nuts on servo studs.
(5) Remove servo from mounting bracket.
(6) Pull speed control cable sleeve away from servo
to expose cable retaining clip.
(7) Remove clip attaching cable to servo.
(8) Reverse removal procedures to install. Block
throttle to full open position to align hole in cable
connector with hole in servo pin and install retaining
clip. Install new push nuts on servo studs. Tighten
servo mounting nuts to 8.5 N·m (75 in. lbs.).
CAUTION:
The cable sleeve must be installed
BETWEEN the servo and bracket to avoid possible
binding of the cable.
Fig. 2 Servo Electrical Connector Location
Fig. 3 Servo 4–Way Harness Connector
ZJ
VEHICLE SPEED CONTROL SYSTEM
8H - 7
DIAGNOSIS AND TESTING (Continued)