Using J 42958 Cruise Control Tester

Using J 42958 Cruise CNTRL Tester

Diagnostic Chart (Part 1 Of 4):

Diagnostic Chart (Part 2 Of 4):

Diagnostic Chart (Part 3 Of 4):

Diagnostic Chart (Part 4 Of 4):

DIAGNOSTIC AIDS
In order to avoid misdiagnosis:
^ Inspect for proper operation of the brake lamps.
^ Visually inspect all fuses relative to the cruise control system.
^ Inspect all connectors for poor terminal retention, corrosion or damage.
^ Inspect the throttle linkage/cable for mechanical binding.
^ Inspect cruise control cable adjustment.
^ EMI on the speed sensor signal circuit may cause erratic operation.

THE CRUISE CONTROL TESTER
It has been found that when this Tester is used on some vehicles with high resistance or an open in the cruise control module ground circuit, the Tester's LED(s) will light abnormally. For example, the Brake/Clutch and VSS LED(s) will light normally but the Ignition LED will be dim with the ON/OFF switch in the OFF position. However, with the ON/OFF switch in the ON position only the VSS LED will light. If you come upon the above situation, please check the ground circuit prior to going on with your diagnosis.