Buick LeSabre 1965 Service Manual page 869

1 1 - 1 3 6 ELECTRO-CRUISE
ACCESSORIES
and vacuum leakage are found to by an authorized repair station,
be satisfactory, the speedometer
e
. Continuity Tests
should be removed and serviced _ ,. ., . . . .. __ .
Continuity of the entire Electro-
Cruise electrical system can be
checked using the wiring dia-
phragm in Figure 11-176.
Electro-Cruise Trouble Diagnosis Chart
A.
B.
C.
D.
E.
F.
G.
H.
COMPLAINT
No action when lever is pushed.
CRUISE lamp comes on when lever or knob
is pushed and no car response.
ELECTRO-CRUISE remains engaged when
brake is touched.
Blow fuses.
Engine races as soon as car is started
when engage lever or knob is not pushed.
ELECTRO-CRUISE will not lock in after
set speed is attained.
Car keeps accelerating up past set speed.
Automatically locks in CRUISE when car
goes over bumps.
POSSIBLE CAUSE
1. Disconnected e l e c t r i c a l connections or
open in wiring.
2. Blown fuses.
3. Brake release switch adjustment.
4. Vacuum leakage.
5. Power unit coil open.
6. Defective transistor amplifier.
1. Harness to speedometer unplugged or loose.
2. Defective speed transducer.
3. Defective transistor amplifier.
4. Defective relay.
1. Brake release switch adjustment.
2. Shorted brake release switch.
3. Shorted wire harness.
1. Shorted wiring.
2. Shorted relay, cruise lamp or power unit
coil.
3. Shorted transistor amplifier.
1. Shorted wire harness.
2. Shorted engage switch.
3. Shorted relay.
4. Vacuum orifice leak in power unit.
5. Stuck accelerator linkage.
1. Defective relay.
2. Defective engage switch.
1. Shorted wire harness.
2. Shorted speedometer.
3. Defective relay.
4. Defective transistor amplifier.
1. Defective relay.