Lit. No. 30118, Rev. 00
June 15, 2020
70
TROUBLESHOOTING
ELECTRICAL TESTING
A simple 12-volt (12V) test light with a ground lead
can be used for circuit testing in most cases. The
exception is the paired multiplex wiring, which
carries a low-level signal from the control to the
plow module. In this case, an ohmmeter may be
used to check continuity.
When directed to check for 12V, ground the test
light lead and probe the terminal.
When asked to check for ground, attach the test
lamp lead to +12V and probe the terminal.
NOTE: 12V is a nominal value. If using a
voltmeter, actual voltage will vary with the
vehicle and presence of loads in tested
circuits. Continuity alone does not guarantee
a good circuit. Poor connectors or damaged
wires may have continuity but be unable to
carry su
ffi
cient current.
CAUTION
Do not probe wires. Doing so will damage
the wire insulation, causing the wire to fail
prematurely.
HOW TO USE THE
TROUBLESHOOTING GUIDE
All malfunctions of the SnowEx
®
RDV™ V-plow
can be categorized as structural, electrical, or
hydraulic. Structural issues are generally related
to the blade, T-frame, lift frame, and mount
components, and are usually identi
fi
ed by visual
inspection. Electrical and hydraulic issues,
however, can be more di
ffi
cult to trace.
Because of the relative complexity of the hydraulic
system, some conditions must be met in order to
develop valid tests.
If the listed conditions are not
met, the procedure can result in inaccurate results
and wasted time.
Go to the "Before You Begin" instructions on the
next page and satisfy the listed conditions before
starting any testing. In many cases, satisfying the
listed conditions alone solves the problem.
Follow along sequentially through the tables and
tests, referring to the relevant sections of this guide
as needed.
FUSE REPLACEMENT
The vehicle control harness contains one
2A automotive-style mini fuse and the hydraulic
unit contains three 5A automotive-style mini
fuses. (See schematics on pages 21, 22, and 32.)
The control fuse is "hot" when the vehicle ignition
switch is ON.
If a problem should occur and fuse replacement
is necessary, the replacement fuse must be of the
same type and amperage rating as the original.
Installing a fuse with a higher rating can damage
the system and could start a
fi
re.
