Diagnosis And Testing - Brake Lamp Switch; Removal; Installation - Chrysler Concorde 2004 Service Manual

8L - 6 LAMPS/LIGHTING - EXTERIOR
BRAKE LAMP SWITCH (Continued)
• Speed control deactivation, and
• Brake sense for ABS and brake transmission
shift interlock
When the brake pedal is in the released position,
the plunger on the outside of the brake lamp switch
is pushed inward by the brake pedal. In this position,
the electrical contacts for one internal switch are
open while the electrical contacts for other two inter-
nal switches are closed.
When the brake pedal is pressed, the plunger on
the outside of the brake lamp switch extends out-
ward. This action closes the electrical contacts for the
one internal switch and opens the contacts for the
remaining two switches within the brake lamp
switch. The internal switch which closes when the
brake pedal is pressed completes the circuit to the
brake lamps at the rear of the vehicle, thus allowing
illumination of the brake lamps and the center-high-
mounted stop lamp (CHMSL).
DIAGNOSIS AND TESTING - BRAKE LAMP
SWITCH
NOTE: Before proceeding with this diagnostic test,
verify the adjustment of the brake lamp switch to
rule out misadjustment. Refer to ADJUSTMENTS.
If the electrical circuit has been tested and the
brake lamp switch is suspected of being faulty, it can
be tested using the following method.
(1) Remove the switch from the vehicle. Refer to
REMOVAL for the proper procedure.
(2) With the switch in the released position (plung-
er extended), use an ohmmeter to test each of the
three internal switches as shown (Fig. 2). You should
achieve the results as listed in the figure.
Fig. 2 SWITCH TEST - RELEASED
(3) Gently push the plunger on the brake lamp
switch in until it stops.
(4) With the switch in the depressed position
(plunger pushed in), use an ohmmeter to test each of
the three internal switches as shown (Fig. 3). You
should achieve the results as listed in the figure.
Fig. 3 SWITCH TEST - DEPRESSED POSITION
If you do not achieve the results as listed in both
figures, the switch is faulty and must be replaced.
(5) Install the switch in the vehicle. Refer to
INSTALLATION for the proper procedure.

REMOVAL

(1) Depress and hold the brake pedal.
(2) Remove the brake switch from it's bracket (Fig.
4). To do so, rotate the brake lamp switch in a coun-
terclockwise direction approximately 30 degrees from
its proper mounting position. Pull the switch rear-
ward and remove it from it's mounting bracket.
(3) Disconnect the wiring harness connector from
switch.

INSTALLATION

NOTE: Prior to installing the brake lamp switch into
it's bracket, the plunger must be moved to its fully
extended position using the procedure in Step 1.
(1) Hold the brake lamp switch firmly in one hand.
Using your other hand, pull outward on the plunger
of the switch until it has ratcheted out to its fully
extended position.
(2) Connect the wiring harness connector to the
brake lamp switch.
LH