Test TC-32A - Repairing Cruise Control Solenoid Circuits
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For appropriate wiring diagram, see WIRING DIAGRAMS
.
- While listening to cruise control servo, cycle cruise control ON/OFF switch. If cruise control servo clicks when cycling ON/OFF switch, go to TEST TC-32B . If cruise control servo does not click when cycling ON/OFF switch, disconnect cruise control servo connector. Inspect connector and clean and repair as needed.
- Place cruise control ON/OFF switch in ON position. Ensure brake pedal is not depressed during following step. Using DRB in voltmeter mode, check cruise control solenoid feed voltage at terminal No. 2 (Dark Blue/Red wire for Cherokee and Dark Blue/Light Green wire for Grand Cherokee) of cruise control servo connector.
- If voltage is less than 10 volts, go to next step. If voltage is more than 10 volts, check ground circuit resistance at cruise control servo connector terminal No. 1 (Black wire) using DRB in ohmmeter mode. If resistance is less than 5 ohms, replace speed control servo. Perform TEST VER-1A . If resistance is more than 5 ohms, repair open system ground (Black) wire to cruise control servo. Perform TEST VER-1A .
- If cruise control solenoid feed voltage is less than 10 volts, backprobe (with connector connected) brake switch connector at terminal No. 4, (Dark Blue/Red wire on Cherokee, Dark Blue/Light Green wire on Grand Cherokee) of solenoid feed circuit. Ensure brake pedal is not depressed. DO NOT disconnect brake switch connector. If voltage is more than 10 volts, repair open in Dark Blue/Red wire (Dark Blue/Light Green wire on Grand Cherokee) between cruise control servo and brake switch. Perform TEST VER-1A .
- If voltage is less than 10 volts, backprobe (with connector connected) ON/OFF switch sense circuit at brake switch connector terminal No. 1 (Yellow/Red wire) using DRB. If voltage is more than 10 volts, adjust or replace brake switch as necessary. Perform TEST VER-1A . If voltage is less than 10 volts, repair open cruise control ON/OFF switch sense circuit (Yellow/Red wire) on Cherokee.
- On Grand Cherokee, remove steering column covers to gain access to cruise control switch connector. Using DRB in voltmeter mode, backprobe (with connector connected) ON/OFF switch sense circuit at cruise control switch connector terminal No. 1 (Yellow/Red wire). If voltage is less than 10 volts, replace cruise control switch. Perform TEST VER-1A .
- If voltage is more than 10 volts, backprobe (with connector connected) ignition 12-volt feed circuit at clockspring connector terminal No. 5 (Yellow/Red wire) using DRB. See Fig 1 . DO NOT disconnect clockspring connector.
- If voltage is less than 10 volts, replace clockspring assembly. See Fig 1 . Perform TEST VER-1A . If voltage is more than 10 volts, repair open cruise control ON/OFF switch sense circuit (Yellow/Red wire) between clockspring and brake switch. Perform TEST VER-1A .