Husqvarna 967187001 Workshop Manual page 106

CST Autotest
9
Remaining in this cable is the seat switch, which
Seat switch
is also supplied with +5 V. Here, the orange cable
must be checked to see that it is not in contact with
GND at the seat switch, if the machine has version
+5V
2 of the cutting motor control, so that the chassis is
connected to GND.
If no fault can be seen here either, the orange lead
must be measured to GND, see item 10.
+5V wire from harnesses 2.
10
Again, unplug the flat pin connector with +5 V
between Cables 1 and 2. With an ohmmeter,
measure between the orange lead and the chassis
to make sure there is no contact. Then measure
between the orange lead and the common GND
connection on the rear carriage where all the blue
leads go.
If there is a low resistance to GND or the chassis,
GND
all the connections with orange leads in Cable 2
must be disconnected and then measure again the
Common point
resistance to GND and chassis. If there is still a
low resistance, there is some contact with GND or
chassis along the orange lead in the cable, in-
spect the cable thoroughly for a short circuit on the
orange lead. In order to have a current higher than
1 A, which is the limit for when CCU shuts down its
+5 V output, the resistance to GND must be lower
than 100 ohms between the orange lead and GND.
106
English –