Cadillac 60 Series 1963 Shop Manual page 576

BODY
16-107
SEAT
FEED TO 40 AMP.
CIRCUIT BREAKER
r- FORWARD CYCLE-PINK
-FEED-RED
3 NOTE.
J
CONNECTOR USED ONLY
WHEN SWITCH IS ON ARM REST
-REARWARD CYCLE-YELLOW
CONTROL SWITCH
/
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SEAT MOTOR
Fig. 16-135 Electric Horizontal Seat Circuit Diagram
101. Four-Way Tilt Seats
The seat adjusters for the bucket-type seats
are actuated by a twelve-volt, reversible, shunt
wound motor with a built-in circuit breaker. See
Fig. 16-136 for bucket seat installation.
On 6039, 6267, 6329, 6339, 6357, 6367 and 6389
styles the control switch is located in the left
front door arm rest.
The seat adjuster operating mechanism incor-
porates a transmission assembly which includes
two solenoids and two drive cables on bucket
seats, leading to the seat adjusters. One solenoid
controls the rear vertical movement of the seat
while the other solenoid controls the horizontal
movement of the seat. When the control switch
is actuated, the motor and one of the solenoids
are energized simultaneously. Then the solenoid
plunger causes the shaft dog to engage with the
large gear dog. Power is then transmitted through
the transmission shaft which in turn drives the
actuator cables. When the adjusters reach their
limit of travel, the drive cables stop their r o -
tating action and torque is absorbed by the rubber
coupler connecting the motor and transmission.
When control switch lever is released the switch
contacts open, a spring returns the shaft dog and
solenoid plunger to their original position disen-
gaging the shaft dog from the large gear dog. See
Seat Section for exploded view of transmission.
a. Checking Procedures
It may be necessary to use only one or all of
the procedures outlined to locate an electrical
failure in the circuit. If the location of the failure
is evident follow only the steps required to check
the affected wire or component. If the location of
the failure is not evident, follow the procedures
as outlined. Before performing any extensive
check procedures, check the seat adjuster drive
cables for proper attachment. In addition, study
the seat circuit diagrams to become familiar with
the seat circuit.
1. Checking for Current at Circuit Breaker
a. Connect one light tester lead to battery side
of circuit breaker, located in fuse block, and
ground other lead. If tester does not light, there
is no current at battery side of circuit breaker.
b. To check circuit breaker, disconnect switch
feed wire from breaker, and with a light tester
check for current at switch side of circuit
breaker. If tester does not light, there is no cur-
rent flowing through circuit breaker.
2. Checking Feed Circuit Continuity at Relay
on Seat Motor
a. Disengage three-way connector body from
the seat motor relay.
b. Insert one light tester lead into the relay
power feed (red wire) connector slot on the har-
ness, and ground other tester lead.
c. If tester does not light, there is no current
at end of feed wire. Failure is caused by an open
or short circuit in feed circuit.
3. Checking for Current at Seat Control Switch
a. Connect one light tester lead to feed terminal
of switch block and ground other light tester lead
to body metal.
b. If tester does not light, there is no current
at switch block. Failure is caused by an open or
short circuit between switch block and power
source.
4. Checking the Seat Control Switch
In the following operations which specify the
seat control switch to be actuated, a switch that
has been checked for proper operation may be
connected to the switch block. If a switch is not
available, a three-way jumper wire can be made
to perform the switch function. The method of
making the jumper wire and the switch locations
to be connected to obtain a specific movement of
the seat are shown in Fig. 16-137. If a jumper
wire is used, number the locations on the switch
block as indicated in Fig. 16-137.
NOTE: To make jumper wire, obtain two
pieces of #12 gage wire, each 4 1/2 inches long.
Join one end of each wire as shown in Fig.
16-137. The joined end can be inserted in the
feed location in the switch block; one of the
remaining ends can be inserted into one of the
solenoid locations.
a. Obtain switch or jumper wire and connect to
switch block.
b. Operate switch if used. If adjusters operate
with new switch or jumper wire but did not op-
erate with original switch, original switch is
defective or connector block was not sufficiently
engaged.