Power Seats - DaimlerChrysler LH New Yorker 1994 Electronic Service Manual

CIRCUIT BREAKER TEST
GENERAL INFORMATION
HARNESS VOLTAGE TEST
MOTOR TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SEAT ASSEMBLY REMOVAL . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION
Power seats can be adjusted in 8 different directions:
• Up or down
• Forward or back
• Tilt forward or rearward
• Recliner up or down
A two single armature permanent magnet reversible
motors are coupled through cables to worm gear box
assemblies. They are located in the seat tracks and upper
supports. The two single gear motor assemblies attach to
the seat tracks provide the various seat movements.
The electrical circuit is protected by a 20 amp cir-
cuit breaker located on the fuse block.
TEST PROCEDURES
Before any testing is attempted the battery should
be carefully charged and all connections and termi-
nals cleaned and tightened to insure proper continu-
ity and grounds.
With dome lamp on, apply switch in direction of fail-
ure. If dome lamp dims the seat motor is trying to work
indicating mechanical jamming. If dome lamp does not
dim, then proceed with the following electrical tests.
CIRCUIT BREAKER TEST
Find correct circuit breaker on fuse block. Pull out
slightly but be sure that circuit breaker terminals still
contact terminals in fuse block. Connect ground wire of
voltmeter to a good ground. With probe of voltmeter
positive wire, check both terminals of circuit breaker for
battery voltage. If only 1 terminal checks at battery
voltage, circuit breaker is defective and must be re-
placed. If neither terminal shows battery voltage, check
for open or shorted circuit to circuit breaker.
HARNESS VOLTAGE TEST
The following test will determine whether or not volt-
age is continuous through the body harness to the
switch.
(1) Remove power seat switch from mounting posi-
tion and disconnect switch from wiring harness.
(2) Connect one lead of test light to Pin 5 of the
ground terminal, and touch other test light lead to Pin 1.

POWER SEATS

CONTENTS
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SEAT TRACK REMOVAL
SWITCH REPLACEMENT REMOVAL . . . . . . . . . . 2
SWITCH TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TEST PROCEDURES
(3) If test light comes on, harness to switch is good. If
test light does not come on, perform circuit breaker test.
MOTOR TESTS
(1) Remove power seat switch from seat.
(2) Disconnect wire harness connector.
(3) Check Pin 5 for battery voltage and Pin 1 for
ground.
(4) To test the seat motors, refer to the Fig. 1 and
verify proper seat responses. Using two jumper wires,
connect one to a battery supply and the second to a
ground. Connect the other ends to the seat wire har-
ness connector as described in Fig. 1.
Fig. 1 Motor Test
POWER SEATS
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8R - 1
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