Installation; Park Lamp Relay; Description; Operation - Dodge dakota 2002 Service Manual

DR
MULTI-FUNCTION SWITCH (Continued)
Fig. 15 MULTIFUNCTION SWITCH
1 - SCREW
2 - COLUMN
3 - CLOCK SPRING
4 - MULTI - FUNCTION SWITCH
(6) Remove the screws retaining the clock spring
to the multifunction switch.

INSTALLATION

WARNING: BEFORE SERVICING THE STEERING
COLUMN THE AIRBAG SYSTEM MUST BE DIS-
ARMED. REFER TO THE ELECTRICAL RESTRAINT
SYSTEM FOR SERVICE PROCEDURES. FAILURE
TO DO SO MAY RESULT IN ACCIDENTAL DEPLOY-
MENT OF THE AIRBAG AND POSSIBLE PERSONAL
INJURY.
(1) Install the clock spring on the multifunction
switch.
(2) Position the switch on to the steering column.
(3) Install the retaining screws (Fig. 15).
(4) Connect the wire harness connector.
(5) Install the upper,
shrouds and the steering wheel. Refer to Steering,
Column, Shroud, Installation.
(6) Connect the battery negative cable.

PARK LAMP RELAY

DESCRIPTION

The park lamp relay is located in the Power Dis-
tribution Center (PDC) of the vehicle. The park lamp
lower steering column
LAMPS/LIGHTING - EXTERIOR
Fig. 16 ISO Micro Relay
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
relay is a conventional International Standards
Organization (ISO) micro relay (Fig. 16). Relays con-
forming to the ISO specifications have common phys-
ical dimensions, current
patterns, and terminal functions.
The park lamp relay cannot be adjusted or
repaired and, if faulty or damaged, the unit must be
replaced.

OPERATION

The park lamp relay is an electromechanical
switch that uses a low current input from the Front
Control Module (FCM) to control a high current out-
put to the park lamps. The movable common feed
contact point is held against the fixed normally
closed contact point by spring pressure. When the
relay coil is energized, an electromagnetic field is
produced by the coil windings. This electromagnetic
field draws the movable relay contact point away
from the fixed normally closed contact point, and
holds it against the fixed normally open contact
point. When the relay coil is de-energized, spring
pressure returns the movable contact point back
against the fixed normally closed contact point. A
resistor is connected in parallel with the relay coil in
the relay, and helps to dissipate voltage spikes and
electromagnetic interference that can be generated as
the electromagnetic field of the relay coil collapses.
The park lamp relay terminals are connected to
the vehicle electrical system through a connector in
the Junction Block (JB). The inputs and outputs of
the headlamp low beam relay include:
• Common Feed Terminal - The common feed
terminal (30) is connected to the park lamps through
8L - 19
capacities, terminal