JBM 51929 Manual De Instrucciones página 3

EN
MANUAL OF INSTRUCTIONS
Test instrument for control measurement of 7-pin plug on trailer and 7-pin socket on towing vehicle.
The product quickly indicates any faults in the electrical system on the trailer or towing vehicle.
Follow the instructions below.
1. FUNCTION TEST OF TRAILER PLUG
1. Connect the trailer plug to the product.
2. Press the yellow button on the side of the product.
3. If all the wires are intact all the status lights (see below) as per ISO
1724 will go on.
4. If a status light does not go on this means the corresponding wire
is faulty.
No. DESIGNATION
6 54
1 L
2 54g
7 58L
3 31
4 R
5 58R
2. FUNCTION TEST OF TOWING VEHICLE
1. Connect the product to the socket for the trailer.
2. Press the yellow button on the side of the product.
3. If all the wires are intact all the status lights will go on. If all the status lights do not go on, see
above.
3. FUNCTION TEST OF EACH SEPARATE TERMINAL
1. Switch on the vehicle ignition and activate the left direction indicator.
2. The corresponding status light should flash with the same frequency; otherwise there is a fault
on the wires for the left direction indictor.
3. Repeat steps 1 and 2 to function test the right direction indicator, rear lights, fog lights and
brake lights. Use a 4 m extension cable to enable the check to be done from the driver seat.
4. TROUBLESHOOTING
PROBLEM
Some status lights do not go on.
No status lights go on.
One or more status lights shine weakly or
irregularly.
All status lights shine weakly or irregularly.
The trailer lights do not go on even though the
product status lights go on.
Note: if the vehicle is fitted with a fog light relay this must be function tested with a 21 w bulb.
FUNCTION
Brake light
Left direction indicator
Rear fog light or 12v
Left rear light
Earth
Right direction indicator
Right rear light
Wire fault, broken bulb or loose
contact.
General wiring fault.
All bulbs broken.
Product battery discharged.
Loose contact.
Contaminated terminals.
General wiring fault.
Product battery discharged.
Short circuit in electrical system
on trailer.
The fuses will trip.
· 3 ·
COLOR
Red
Yellow
Blue
Note: terminal 54g can
Black
be used for rear fog light
or for 12 v connection
White
(i.e. direct lead from the
Green
battery).
Brown
TRAILER
Wire fault, broken bulb or
loose contact.
General wiring fault.
All bulbs broken.
Product battery discharged.
Loose contact.
Contaminated terminals.
General wiring fault.
Product battery discharged.
TOWING VEHICLE