The most accepted hot water with cruise control systems is failure to engage and failure to preserve a locate velocity. Depending on the year and imitation of the vehicle, characteristic tools such as a volt metre and vacuum tester may be needed for diagnosing the dilemma. Consult your service manual before inception of this procedure for anything earmarked to function your vehicle.
Instructions
1. Diagnose the dilemma whether the cruise curb does not activate. Proof the cruise determination fuse. This manner is usually overlooked and diagnosis focuses on what seems to be extended possible problems. If the results of these checks are satisfactory, the controller is usually defective. Buy a new part at your local parts store or dealer.6. Probe both sides of the fuse. Whether one or neither lights the assessment glowing, the fuse is defected and alter. Research the cruise control step after changing the fuse. Whether it works, no too repairs are expedient. Whether not, draw out on with these procedures.
2. Effect a visual research of all wiring relating to the cruise containment method. End your inspection mirror to gape places you can't study otherwise. Attending for melted insulation, broken wires, burned wires and twisted wires without a wire connector. Repair any wire damage with the splicing and wire connecting item and the due proportions wire connector for the wire you are repairing. Exercise a wiring diagram and a volt metre to place wires going to the controller and servo terminals. Your service manual Testament disclose you what the voltage should be and whether the servo and controller are operating at the correct voltage. Wiring and wire connectors can be purchased at your local parts store or dealer.
3. Visually inspect the brake (and clutch if so equipped). If these are out of adjustment, the voltage cannot get to the components down stream with enough power to function the cruise control. These can be adjusted to the right setting by using your service manual for the correct position.
4. For vacuum-operated systems, you will need to perform different steps than those used for an electronic set-up. Start the engine. Using your vacuum gauge, check for vacuum at the vacuum line to the servo. Vacuum should read 10 inches of mercury at idle speed. If you can't locate these parts, use your service manual to locate them.
5. Visually inspect for vacuum leaks in the release hose and valve. Replace the hose if leaking. Use the digital volt ohm meter to check the resistance of the servo solenoid windings. Check your service manual for the correct readings. Check for a vacuum leak at the servo. Allot the fuse box under the Chauffeur's console. It has a plastic subsume that can be removed . Analysis the inside diagram to halt which fuse you extremity to research.
If the cruise control system fails to preserve the set speed, check the throttle linkage adjustment. Use your service manual for the correct procedure for adjusting the linkage. If the linkage is properly adjusted, check for vacuum leaks at the servo. Turn the engine of if turned on, and use jumper wires to energize the servo solenoid valves. Apply vacuum using the hand held vacuum pump. If the servo fails to hold vacuum, replace it with a new part. This part can be purchased at your local part store or dealer. If both tests are good, this means that the cruise controller is inoperative and must be replaced. This part can also be found at your local parts store or dealer.
