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Even if the truck 7 pin socket
(ISO 7638) has a CAN data li-
ne, if the spiral cable used bet-
ween the truck and the trailer
is 5-core, it will cause the trai-
ler EBS Modulator to not work
properly. For this reason, a 7
core spiral EBS patch cable
should always be used.
If you drive without EBS con-
nectors or if there is a prob-
lem on the EBS system, the
brake system will not be wor-
ked properly. This situation
may cause an accident.
Trailers are equipped with an
additional power supply for
the EBS system. Thanks to
the extra power supply from
brake lamps, when the EBS
connector is damaged, an ex-
tra safety function will be acti-
vated. The EBS system will be
fed from brake lamps and ALB
(automatic load sensing bra-
king pressure) and ABV (anti-
skid system) functions will be
activated.
3.1.4. PREV ( Park Release Emer-
gency Valve )
Generally, brake control systems will be
located on the driver's side. It may be dif-
ferent on your vehicle according to the
vehicle's construction.
Black button (1): Service brake button.
Black button
The black button is located under the
marked area in the image below.
The location of black button
Red button (2): Park brake button
Park red button
When you are driving the trai-
lers, the red button must be
pushed position and the black
button has to be pulled
position.
3.1.4.1. Service Brake
Black button
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