BENDIX TE-1 TRAILER EMERGENCY STOP LIGHT User manual

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®
Bendix®TE-1™Trailer Emergency Stop Light Switch
SD-06-1801
FIGURE 1
TERMINALS
SPRING
PLUNGER DIAPHRAGM
FIGURE 2 FIGURE 3
TE-1™TRAILER EMERGENCY STOP LIGHT SWITCH IN
TP-2™, TW-1™TRACTOR PROTECTION SYSTEM.
SUPPLY
SUPPLYAND
MOUNTING
PORT
OPTIONAL TE-1™
TRAILER EMERGENCY
STOP LIGHT SWITCH
SUPPLY POINTS
TRAILER
EMERGENCY
TP-2™TRACTOR
PROTECTION VALVE
TE-1™TRAILER EMERGENCY STOP LIGHT SWITCH IN
TP-3™, PP-3™TRACTOR PROTECTION SYSTEM.
TW-1™TWOWAY
CONTROL VALVE PP-3™TRAILER
SUPPLY VALVE
SUPPLY
SUPPLYAND
MOUNTING
PORT
OPTIONAL TE-1™
TRAILER
EMERGENCY STOP
LIGHT SWITCH
SUPPLY POINTS
TRAILER
EMERGENCY
TP-3™TRACTOR
PROTECTION VALVE
DESCRIPTION
The trailer emergency stop light switch is an electro-
pneumaticswitchandlightsthetrailerstoplightsifpressure
inthe tractor emergency linereduces to approximately 60*
psiforanyreason,orifthetractorprotectionvalveisoperated
manually.
Referring to Figure 1 (Sectional View), with air pressure
above approximately 60* psi in the line in which the switch
isconnected,air pressure acting upon the diaphragm under
the plunger overcomes pressure of the spring and keeps
the contacts separated.
If air pressure in the air brake system reduces to
approximately60* psi for any reason,thespringovercomes
thepressureunderthediaphragm,closesthe contacts and
lights both tractor and trailer stop lights.
Continued reduction of air pressure will disconnect tractor
stop lights but the trailer stop light will continue to light.
*Older switches were set at 55 psi.

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PREVENTIVE MAINTENANCE
Important: Review the Bendix Warranty Policy before
performinganyintrusivemaintenanceprocedures.Awarranty
maybevoidedifintrusivemaintenanceisperformedduring
thewarrantyperiod.
No two vehicles operate under identical conditions; as a
result, maintenance intervals may vary. Experience is a
valuableguide in determining thebestmaintenanceinterval
for air brake system components.At a minimum, the TE-1™
valveshouldbeinspectedevery 6monthsor 1500operating
hours, whichever comes first, for proper operation and
electrical connections. Should the TE-1™valve not meet
theelements oftheoperational testsnotedinthis document,
furtherinvestigationandserviceofthevalvemayberequired.
TESTING FOR SERVICEABILITY
A. OperatingTest
1. With ignition switch on and system fully charged,
makeandhold a foot valve application and notethat
stop lights on tractor and trailer are functioning
properly.
2. Place tractor protection control valve in the
emergency position and note that the trailer stop
lightsare functioningproperly.
3. Place tractor protection control valve in normal
positionandreduceairpressureinsystembymaking
severalfootvalve applications or by slowlydraining
reservoirsandobservingdashgauge;notethattrailer
stop lights function at approximately 60* psi.
B. LeakageTest
Coat the entire switch with soap solution and check for
leaks;no leakage permitted.
If the trailer emergency stop light switch does not function
as described or if leakage is present, it is recommended
that the switch be replaced with a new switch available at
thenearest Bendix authorizeddistributor.
Noattempt shouldbemade todisassembleandrepair faulty
switch.
REMOVING
A. Place tractor protection control valve in emergency
position.
B. Disconnect electrical connections at switch.
C. Removeswitch.
INSTALLING
(Referto piping diagrams- Figure 2 andFigure 3.)
A. Installindelivery port of tractorprotection control valve
or in control line between control valve and tractor
protectionvalve.Alternateinstallation can be made with
ateeconnectionoffthe emergency line after the tractor
protectionvalve.
B. Wireasperwiring diagram (Figure 4).
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID
PERSONAL INJURYOR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
Always wear safety glasses.
2. Stop the engine and remove ignition key when
working under or around the vehicle. When
working in the engine compartment, the engine
should be shut off and the ignition key should be
removed. Where circumstances require that the
enginebe in operation, EXTREMECAUTION should
be used to prevent personal injury resulting from
contact with moving, rotating, leaking, heated or
electrically charged components.
3. Do not attempt to install, remove, disassemble or
assemble a component until you have read and
thoroughly understand the recommended
procedures. Useonly the proper tools and observe
all precautions pertaining to use of those tools.
FIGURE 4
TE-1™TRAILER EMERGENCY STOP LIGHT SWITCH WIRING DIAGRAM
ACCESSORY POLE, IGNITION
SWITCH, ETC., THAT IS OFF
WHEN ENGINE IS OFF
BATTERY
TRACTOR STOP
LIGHT SWITCH TRACTOR STOP LIGHTS
ELECTRICAL
COUPLING
TE-1™TRAILER
EMERGENCY STOP
LIGHT SWITCH TRAILER STOP LIGHTS
IGN
TLR TTR
*Older switches were set at 55 psi.

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4. If the work is being performed on the vehicle’s air
brake system, or any auxiliary pressurized air
systems,make certainto drain theair pressurefrom
all reservoirs before beginning ANY work on the
vehicle. If the vehicle is equipped with an AD-IS™
air dryer system or a dryer reservoir module, be
sure to drain the purge reservoir.
5. Following the vehicle manufacturer’s
recommendedprocedures, deactivate theelectrical
system in a manner that safely removes all
electrical power from the vehicle.
6. Never exceed manufacturer’s recommended
pressures.
7. Never connect or disconnect a hose or line
containing pressure; it may whip. Never remove a
component or plug unless you are certain all
system pressure has been depleted.
8. Use only genuine Bendix®replacement parts,
components and kits. Replacement hardware,
tubing, hose, fittings, etc. must be of equivalent
size, type and strength as original equipment and
be designed specifically for such applications and
systems.
9. Components with stripped threads or damaged
parts should be replaced rather than repaired. Do
not attempt repairs requiring machining or welding
unless specifically stated and approved by the
vehicle and component manufacturer.
10. Prior to returning the vehicle to service, make
certain all components and systems are restored
to their proper operating condition.

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BW1595 © 2004 Bendix Commercial Vehicle Systems LLC All rights reserved. 3/2004 Printed in U.S.A.