lumbar support DODGE RAM 1999 Service Repair Manual


SEA TS - P O W ER

1999 D odge P ic ku p R 1500
1999 ACCESSORIES & EQUIPMENT
CHRY - Power Seats
Ram Pickup, Ram Van & Ram Wagon
DESCRIPTION & OPERATION
Driver's power seat can be adjusted in 6 different
directions: up, down, forward, back, tilt forward, or tilt rearward.
The power seat system consists of a 6-way switch, motor assembly, seat
adjuster, motor cable, housing and wiring harness.
The power seat system receives battery power through circuit
breaker and a fuse in the Power Distribution Center (PDC). Battery
voltage is available to power seat system at all times. Three
permanent magnet reversible motors are coupled through cables to worm
gear box assemblies located in the seat tracks, providing the various
seat movements.
On Ram Pickup with extended cab (club cab and quad cab),
driver's seat also includes power operated lumbar support. Lumbar
support can be inflated or deflated as needed, using additional
switch. On seats with lumbar support, seat back remains at same
height, while seat cushion raises and lowers. On seats without lumbar
support, entire seat raises and lowers. On all seats, entire seat
moves forward and backward.
TROUBLE SHOOTING
NOTE: Before any testing is attempted, the battery should be fully
charged and all connections and terminals cleaned and
tightened to ensure proper continuity and chassis grounds.
POWER SEAT INOPERATIVE
With dome light on, apply power seat switch in direction of
failure. If dome light dims, power seat may be jamming. Check for
binding or obstructions. If dome light does not dim, check individual
components. See COMPONENT TESTS.
COMPONENT TESTS
HARNESS VOLTAGE TEST
NOTE: This test will determine whether or not voltage is continuous
through body harness to power seat switch.
1) Remove power seat switch from mounting position and
disconnect switch from wiring harness. See POWER SEAT SWITCH under
REMOVAL & INSTALLATION.
2) Connect test light lead to ground terminal (Black wire on
Ram Van and Ram Wagon; Black/Orange wire on Ram Pickup) at power seat
switch harness connector. Using test light, probe power supply wire
(Red/Light Blue wire) at power seat switch harness connector.
3) If test light comes on, power and ground circuits to power
seat switch are good. If test light does not come on, check ground
circuit. See WIRING DIAGRAMS. Repair as necessary. If ground circuit
is okay, check power supply. See CIRCUIT BREAKER. Check ground circuit
for continuity.

Removal & Installation (Ram Pickup Without Lumbar Support)
Disconnect negative battery cable. Remove 2 screws holding
switch and bezel to seat. Pull switch from seat far enough to access
connector, and disconnect connector. Remove 2 screws holding switch to
bezel. Remove switch from bezel. To install, reverse removal
procedure.
Removal & Installation (Ram Pickup With Lumbar Support)
Disconnect negative battery cable. Remove recliner lever.
Remove 3 screws holding side shield to seat. Pull shield from seat far
enough to access connector, and disconnect connector. Remove 2 screws
holding switch to shield. Remove switch from shield. To install,
reverse removal procedure.
Removal & Installation (Ram Van & Ram Wagon)
Remove seat adjuster and motors assembly from seat. See
MOTOR. Remove 2 switch bezel mounting screws from inside seat cushion
frame. Disconnect switch wire connector. Remove 2 power seat switch-
to-bezel screws. To install, reverse removal procedure. Tighten screws
to 20 INCH lbs. (2.2 N.m).
POWER LUMBAR ADJUSTER & MOTOR
Removal & Installation
Disconnect negative battery cable. Remove driver's seat back.
Disconnect wiring connector. Disconnect clips and remove power lumbar
adjuster and motor assembly. To install, reverse removal procedures.
WIRING DIAGRAMS