1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

9 - 28 OVERDRIVE
Remove solenoid cover and see if solenoid stem has been
forced past upper contact spring. Check pawl for release;
if pawl cannot be withdrawn freely from engagement, or
if the car cannot be pushed forward by hand, with one of
the forward transmission speeds engaged, the solenoid
unit has probably been damaged internally and must be
repaired or replaced. If no such damage is apparent and
the solenoid Installation appears proper, the solenoid
itself may be sticking. If car will roll backward -
B. Push overdrive dash control knob in, disconnect wire
from "A" terminal of generator and momentarily connect
loose end to negative post of battery by means of a
jumper. If overdrive relay and solenoid do not click,
follow procedure at E. If click occurs it indicates a circuit
ground between the relay and the governor or within the
relay or governor.
C. Pull overdrive dash control knob out and again momentarily
connect loose end of generator "A" terminal wire
to the negative post of battery. If no click occurs
grounded circuit is indicated between the control switch
and governor or within the governor; follow procedure E
and F. If click occurs -
D. Hold kickdown switch open,either by pressing the accelerator
pedal to the floor, or by pressing the kickdown
switch stem by hand,and momentarily connect loose end
of generator "A" wire to negative post of battery. If no
click occurs; a grounded circuit is indicated between the
control switch and the kickdown switch; follow tracing
procedure F. If click occurs ground is indicated between
kickdown switch and relay or within one of these units;
follow procedure G and H.
E. With generator "A" wire connected to the negative post
of battery and overdrive dash control pushed in disconnect
governor. If click occurs, replace governor. If no
click occurs at governor, replace connection, and disconnect
governor wire at control switch. If click occurs,
inspect wire for ground; also inspect switch terminal for
grounding contact with some other part of the car. If no
click occurs replace connection, and -
F. With governor "A" wire connected as in E, disconnect
other wire at control switch; if click occurs inspect terminal
for a ground. If none is found replace switch. If no
click occurs disconnect harness plug from kickdown
switch. If click occurs a ground is indicated in either the
wire between the kickdown and the control switch or in
the kickdown switch. Connect test harness to overdrive
harness plug which was removed from kickdown switch
but do not plug into kickdown switch. Connect circuits 1
and 4 momentarily. If no click occurs, kickdown switch
is defective; if relay clicks the wire between the kickdown
switch and the control switch is grounded.
G. With generator "A" wire connected as in E, disconnect
harness plug from kickdown switch. If relay clicks, kickdown
switch is grounded. If there is no click the wire
between the relay and the kickdown switch or the relay is
grounded.
H. Connect test harness in system at relay and break the No.
2 circuit. If relay clicks the wire to the kickdown switch is
grounded, if it does not click relay is grounded and
should be replaced.
CONDITION NO. 9
WILL NOT kickdown FROM OVERDRIVE:
A. Ground No. 6 (3/1611 terminal screw) terminal of the
solenoid, with engine running. Press kickdown switch
stem by hand. If engine stops inspect connection at terminal,
and also contacts inside solenoid for proper closing
when stem is extended. If engine does not stop,Install test
harness at kickdown switch and ground No. 4 circuit.
When the No. 3 circuit is grounded engine should stop
when the throttle switch stem is pressed. If it does not,
replace switch. If the engine does not stop when either of
the terminals is grounded, wire or connections are defective
between the throttle switch and the primary terminal
of the ignition coil. This connection is made to the primary
terminal of the ignition coil that is connected to the
distributor.