Buick LeSabre 1965 Service Manual page 870

ACCESSORIES
ELECTRO-CRUISE 1 1 - 1 3 7
Electro-Cruise Trouble
COMPLAINT
I. Drops out of CRUISE control when over
bumps.
J. Erratic cruise speed.
K. Slow response.
L. Hunts at slow speed.
M. Does not disengage when engage lever is
pulled out.
N. CRUISE lamp does not light.
O. Engine will not idle at slow speed when
ELECTRO-CRUISE is not engaged.
P. Speed setting p o i n t e r and speedometer
needle do not coincide speed when in cruise.
Diagnosis Chart (Cont'd)
POSSIBLE CAUSE
1. Defective relay.
2. Loose electrical connections.
3. Brake release switch adjustment.
1. Loose electrical connections.
2. Defective speedometer.
3. Defective power unit.
4. Vacuum leakage.
1. Vacuum leakage.
1. Defective speedometer.
2. Bead chain adjustment.
3. Stiff accelerator linkage.
4. Vacuum leakage.
5. Dragging brakes.
1. Shorted wire harness.
2. Shorted engage switch.
3. Defective relay.
1. Burned out lamp bulb.
2. Defective relay.
3. Disconnected e l e c t r i c a l connections or
broken wiring.
1. Vacuum leakage.
2. Bead chain adjustment.
1. Stiff throttle linkage.
2. Vacuum leakage.
3. Speedometer out of calibration.
4. Kinked speedometer cable.