Testing Procedures For 1983 & 1984 Line Installed Cruise Control
FIGURE 1:
The required components are:
* 1983/1984 Line Installed cruise Control (white) tester harness. SOA 386C403.
* Specific Cruise Control Module Tester Box SOA 386C401.
* A continuous vacuum source. Such as an A/C evacuation pump, (a hand operated pump will not create enough vacuum).
Ensure all connections (vehicle and tester harness) make good electrical contact to avoid erratic test results.
If the light(s) on the module tester box do not respond as they should, a more complete inspection of that particular circuit (including wire continuity), is necessary.
CAUTION: Do not operate engine with the tester installed. Doing so could result in a wide-open throttle condition.
1. Remove driver's side underdash trim panel. Disconnect the vehicle harness from the cruise control module located under the dash on the driver's side.
2. Connect cruise test harness to vehicle harness. Connect the module tester box (Specific) to cruise test harness.
3. With ignition switch OFF, and the cruise control main switch OFF, the lights on the tester should all be OFF.
4. On automatic and manual transmission vehicles, place the transmission selector in the NEUTRAL position.
5. Turn ignition switch ON. Caution: Do not start engine. The tester BRAKE/CLUTCH and TACH lights should go ON.
6. Push the cruise control switch (On/Off) to the ON position. The cruise control light on the steering column should go ON. The tester lights should indicate the following:
MODULE TESTER BOX LIGHT AUXILIARY BOX LIGHT
RESUME OFF CLUTCH (M/T or A/T) ON
SET OFF BRAKE LIGHTS OFF
BRAKE/CLUTCH ON
SAFETY OFF
NEUTRAL ON (A/T)
OFF (M/T Not Used)
TACH ON
OFF OFF
IGNITION ON
SPEED OFF or ON
VAC ON
VENT ON
7. Actuate RESUME, SET and COAST functions, using the control handle. As each function is actuated, the RESUME, SET, or OFF tester lights should go ON.
8. Press brake pedal. The BRAKE/CLUTCH tester light should go OFF and the BRAKE LIGHTS tester light (on auxiliary box) should go ON.
9. If manual transmission vehicle, depress clutch. The CLUTCH tester light (on auxiliary box) should go OFF.
10. If the vehicle has an automatic transmission, move the transmission selector lever from neutral position to drive position. The tester NEUTRAL light should go OFF. Return the selector to neutral position. The tester NEUTRAL light should go ON.
11. Note the condition (On or Off), of the tester speed light. Roll the vehicle forward or backward several feet. The SPEED light should flash ON and OFF alternately with the vehicle movement.
12. Actuate, in turn, the tester VAC and VENT buttons. The appropriate tester VAC or VENT light should go OFF and a clicking sound should be heard under the hood at the valve body, indicating valve actuation.
13. If any of the above checks do not give the proper tester light operation, check the appropriate component for malfunction and proper wiring.
The remainder of the test is done under the hood. Remove the tester harness from inside the vehicle and bring around to the right front of the vehicle. It is not necessary to reconnect the module to the vehicle harness to continue testing.
FIGURE 2:
14. Locate the actuator assembly (See Figure 2), and disconnect the vacuum hose and electrical connector leading to it. Connect a continuous vacuum source (Example: A/C evacuation pump) to the actuator assembly. Connect the tester harness (4-pin connector) to the actuator assembly. Connect the test harness power leads to the battery (red positive, black negative). The tester VAC, VENT, and SAFETY lights should go ON.
15. Depress the tester VENT and SAFETY buttons. The tester VENT and SAFETY lights should go OFF and a clicking sound from the actuator should be heard while the button is depressed.
16. Holding the SAFETY and VENT buttons depressed, momentarily actuate the tester VAC button. The tester VAC light should go OFF with button depressed and movement of the vehicle throttle should be noted at the carburetor. A clicking sound of the VAC valve in the actuator should also be noted.
17. Release the tester SAFETY button. A clicking sound from the actuator should be noted along with the throttle moving toward the closed position.
18. Depress the tester VENT and SAFETY buttons and momentarily actuate the tester VAC button to open the throttle. Release the tester VENT button. The tester VENT light should go ON. A clicking sound from the valve in the actuator should be heard, and the throttle should go closed.
19. Release the tester buttons. If any of the above checks do not give the proper tester light operation, check the appropriate component for malfunction and proper wiring.
20. Remove the tester harness leads from the battery, disconnect the tester harness and the vacuum source from the actuator assembly. Reconnect the vehicle harness and the vehicle vacuum line to the actuator.
21. If at this point all components check according to procedure, the cause of inoperation is the module. Install a new module and verify correction.