power sources, and others use a single, split
source. In the end, the manufacturer’s wiring
system diagram is the only practical way to
find the appropriate power supply.
Power supply conductors are often bun-
dled into a harness with the signal-carrying
conductors. Remember, it is essential to use
the manufacturer’s cable harness. If you have
to alter the cable length, some manufacturers
offer harnesses in a variety of lengths to
accommodate different installation require-
ments. Pay close attention to any specified
minimum bend radius. These harnesses may
not come supplied with fuses to protect them
in the event of an electrical overload or
short circuit; be sure to use the manufac-
turer-recommendedfuses and locate them
where specified.installing communicationsand position-finding systems 155