Dodge Viper SRT-10 (ZB). Manual — part 74
BRAKE LAMP SWITCH
DESCRIPTION
The brake lamp switch is located under the instru-
ment panel, at the brake pedal arm. It has three
internal switches controlling various functions of the
vehicle. It’s main function is to control operation of
the vehicle’s brake lamps.
CAUTION: The brake lamp switch can only be
adjusted once. That is during initial installation of
the switch. If the switch is not adjusted properly or
has been removed for some service, a new switch
must be installed and adjusted.
OPERATION
When the brake pedal is pressed, the plunger on
the outside of the brake lamp switch extends out-
ward. This action opens or closes the contacts of the
three switches inside the brake lamp switch.
With the brake pedal pressed down (plunger
extended), the switch for terminals 1 and 2 is closed
completing the circuit. The switch for terminals 3
and 4 is open and so is the switch for terminals 5
and 6.
When the brake pedal is released (plunger pushed
in), the three switches assume the opposite positions.
The switch for terminals 1 and 2 is now open while
the other two switches are now closed, completing
their circuits.
A lever on the back of the switch is used to set the
switch into the “adjusted” position. A non-adjusted
switch will have the lever set to the diagonal position
in relation to the switch housing. The plunger can be
moved in and out, but the states of the internal
switches will not change.
CAUTION: Never move the adjustment lever of the
new brake lamp switch without it being properly
installed in the vehicle first. Such action will render
the switch unusable and the switch must be dis-
carded.
Once installed in the vehicle as described in the
brake lamp switch installation procedure (Refer to 8 -
ELECTRICAL/LAMPS/LIGHTING
-
EXTERIOR/
BRAKE LAMP SWITCH - INSTALLATION), the new
switch’s adjustment lever is rotated to the adjusted
position as indicated. This action locks the plunger to
the internal switches. Once in this position the
switch is permanently adjusted (or locked) and
cannot be readjusted or released even if the
lever is moved back.
DIAGNOSIS AND TESTING - BRAKE LAMP
SWITCH
NOTE: Before proceeding with this diagnostic test,
verify the adjustment lever on the back of the
switch is in the adjusted position. If the lever is in
the non-adjusted (diagonal) position it may have
never been adjusted (Refer to 8 - ELECTRICAL/
LAMPS/LIGHTING
-
EXTERIOR/BRAKE
LAMP
SWITCH - OPERATION). For adjustment, (Refer to 8
-
ELECTRICAL/LAMPS/LIGHTING
-
EXTERIOR/
BRAKE LAMP SWITCH - INSTALLATION)
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 8
- ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/
BRAKE LAMP SWITCH - REMOVAL)
(2) With
the
switch
in
the
released
position
(plunger extended), use an ohmmeter to test each of
the three internal switches as shown (Fig. 1). You
should achieve the results as listed in the figure.
(3) Gently push the plunger on the brake lamp
switch in until it stops.
(4) With the switch in this depressed position
(plunger pushed in), 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.
If you do not achieve the results as listed in both
figures, the switch is faulty and must be replaced.
Refer to Removal And Installation in this section.
If the switch is found to be operating properly, it
may be misadjusted. Do not reinstall the switch,
replace it. (Refer to 8 - ELECTRICAL/LAMPS/
LIGHTING - EXTERIOR/BRAKE LAMP SWITCH -
INSTALLATION)
Fig. 1 SWITCH TEST - RELEASED POSITION
8L - 4
LAMPS
ZB
CAUTION: The switch can only be adjusted once.
That is during initial installation of the switch. If the
switch
is
not
adjusted
properly
or
has
been
removed for any reason, a new switch must be
installed and adjusted.
REMOVAL
(1) Disconnect and isolate battery negative cable
from its post on battery.
(2) Under instrument panel, remove brake lamp
switch by rotating switch in counterclockwise direc-
tion approximately 30 degrees and pulling it out of
bracket (Fig. 3).
(3) Disconnect
wiring
harness
connector
from
switch (Fig. 3).
(4) Discard brake lamp switch. It must not be
reused.
INSTALLATION
CAUTION: Do not reuse the original brake lamp
switch. This switch can only be adjusted once. That
is during initial installation of the switch. If the
switch
is
not
adjusted
properly
or
has
been
removed for some service, a new switch must be
installed and adjusted.
(1) Obtain NEW brake lamp switch. Adjustment
lever on new switch should be at a 45° angle from
wiring connector. If adjustment lever is parallel
with wiring connector, switch has been preset
and must be scrapped. DO NOT ATTEMPT TO
RESET
(OR
READJUST)
BRAKE
LAMP
SWITCH.
(2) Connect wiring harness to connector on switch
(Fig. 3).
(3) Mount and adjust NEW brake lamp switch
using following steps:
(a) Install switch in its bracket by aligning the
index tab on switch with notch in mounting
bracket.
(b) When switch body is fully seated in its
bracket, rotate switch clockwise approximately 30°
to lock switch into place.
(c) With brake pedal in fully released position,
move adjustment lever on brake lamp switch from
45° angled non-adjusted position, clockwise as
shown, until it is parallel with wiring connector
(Fig. 4). Brake lamp switch is now properly
adjusted to vehicle.
(4) Reconnect battery negative cable to post on
battery.
Fig. 2 SWITCH TEST - DEPRESSED POSITION
Fig. 3 Brake Lamp Switch Mounting
1 - ADJUSTABLE PEDALS ASSEMBLY
2 - SWITCH BRACKET
3 - BRAKE LAMP SWITCH
4 - WIRING HARNESS
5 - CLIP
Fig. 4 Adjustment Lever Movement
ZB
LAMPS
8L - 5
BRAKE LAMP SWITCH (Continued)
(5) Check stop lamps to verify they are operating
properly and not staying on when brake pedal is in
released position.
(6) Road test vehicle to ensure proper operation of
brakes (including ABS) and lamps.
CENTER HIGH MOUNTED
STOP LAMP UNIT
REMOVAL
(1) Open deck lid.
(2) Remove four bolts to battery compartment
cover and remove cover.
(3) Disconnect and isolate the battery negative
cable.
(4) Disconnect the one electrical connector inside
of deck lid.
(5) Remove, four nuts retaining the Center High
Mounted Stop Lamp (CHMSL) to the deck lid.
(6) Push CHMSL into trunk area and remove from
vehicle.
INSTALLATION
(1) Push CHMSL into deck lid.
(2) Install four nuts retaining the Center High
Mounted Stop Lamp (CHMSL) to the deck lid. Torque
nuts to 4 N·m (35 in lbs.).
NOTE: Make sure lamp is centered in deck lid open-
ing.
(3) Connect the one electrical connector inside of
deck lid.
(4) Connect the battery negative cable.
(5) Place battery access cover into place and install
four bolts.
(6) Close deck lid.
(7) Verify vehicle and system operation.
FOG LAMP - FRONT
REMOVAL
(1) Open deck lid.
(2) Remove four bolts to battery compartment
cover and remove cover.
(3) Disconnect and isolate the battery negative
cable.
(4) Remove access panel within wheel well (Fig. 5).
(5) Remove the fog lamp by turning 1/4 turn coun-
terclockwise and pulling straight out.
(6) Disconnect the electrical connector from the fog
lamp and remove from vehicle.
INSTALLATION
CAUTION: Do not touch the glass of halogen lamps
with fingers or other possibly oily surface. Reduced
lamp life will result.
(1) Connect the electrical connector to the fog
lamp.
(2) Install the fog lamp by turning 1/4 turn clock-
wise.
(3) Install the access panel within wheel well (Fig.
5).
(4) Connect the battery negative cable.
(5) Place battery access cover into place and install
four bolts.
(6) Close deck lid.
(7) Verify vehicle and system operation.
(8) Verify fog lamp aim. If adjustment is necessary,
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/HEADLAMP UNIT - STANDARD PRO-
CEDURE). At 25 feet on level surface, the fog lamp
beam should be 11 inches off floor on alignment
screen.
FOG LAMP UNIT - FRONT
REMOVAL
(1) Open deck lid.
(2) Remove four bolts to battery compartment
cover and remove cover.
(3) Disconnect and isolate the battery negative
cable.
(4) Remove fog lamp access cover (Fig. 5).
(5) Disengage fog lamp connector.
(6) Remove three screws attaching fog lamp to
front bumper fascia.
(7) Remove fog lamp from fascia.
INSTALLATION
(1) Install fog lamp unit to fascia.
Fig. 5 FOG LAMP ACCESS PANEL
8L - 6
LAMPS
ZB
BRAKE LAMP SWITCH (Continued)
(2) Install three mounting screws attaching fog
lamp unit to front bumper fascia. Torque screws to 4
N·m (35 in. lbs.).
(3) Connect fog lamp connector.
(4) Install fog lamp access panel (Fig. 5).
(5) Connect the battery negative cable.
(6) Place battery access cover into place and install
four bolts.
(7) Close deck lid.
(8) Verify vehicle and system operation.
(9) Verify fog lamp aim. If adjustment is necessary,
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/HEADLAMP UNIT - STANDARD PRO-
CEDURE). At 25 feet on level surface, the fog lamp
beam should be 11 inches off floor on alignment
screen.
FOG LAMP - REAR (EXPORT)
DESCRIPTION
Rear fog lamps are used to make the vehicle more
visible from the rear during foggy or low light condi-
tions. The driver controls the rear fog lamp operation
through a switch located on the multi-function
switch.
FOG LAMP UNIT - REAR
(EXPORT)
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the bolts from the rear fog lamp
bracket (Fig. 6).
(3) Disconnect the electrical connector and remove
the rear fog lamp through the hole in the rear fascia
(Fig. 7).
INSTALLATION
NOTE: Only perform steps 2-4 if installing a new
wiring harness.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the rear extension belly pan (Refer to
23 - BODY/EXTERIOR/BELLY PAN - REMOVAL).
Fig. 6 REAR FOG LAMP MOUNTING
1 - REAR BELLY PAN
2 - BOLTS
Fig. 7 REAR FOG LAMP IN POSITION
1 - REAR FOG LAMP
2 - REAR FASCIA
ZB
LAMPS
8L - 7
FOG LAMP UNIT - FRONT (Continued)
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