Troubleshooting Guide; Introduction; How To Use The Troubleshooting Guide; Electrical Testing - Western HTS Mechanic's Manual

TROUBLESHOOTING GUIDE

INTRODUCTION

All malfunctions of the
HTS™ snowplow can be categorized
as structural, electrical, or hydraulic.
Structural issues are generally
related to the blade, A-frame, lift
frame, and mount components
and are usually identifi ed by visual
inspection. However, electrical and
hydraulic issues can be diffi cult to
trace.
Read and understand the Theory
of Operation before attempting
troubleshooting.
Lit. No. 41467, Rev. 01

HOW TO USE THE TROUBLESHOOTING GUIDE

Because of the relative complexity of
the snowplow electrical and hydraulic
systems, some conditions must be
eliminated in order to develop valid
tests.
If the listed conditions are not
met, the procedure can result in
inaccurate results and wasted time.
In many cases, satisfying the listed
conditions alone solves the problem.
1. Go to the Before You Begin
section (next page), and satisfy
the listed conditions. These
conditions must be met before
proceeding to any of the tables
and tests that follow.
2. If a lighting problem exists,
proceed to the proper Headlamp
Troubleshooting tables for a
list of basic test questions and
solutions to common problems.
3. If you're still having problems or
the problem is not related to the
headlamps, go to the Hydraulic
System Testing section.
4. Follow along sequentially through
the tables and tests, referring
to the Hydraulic & Electrical
Schematics and System
Overview sections as needed.
Eventually the problem can be
identifi ed at the component level.

ELECTRICAL TESTING

Read and understand the electrical
circuit operation information in the
Theory of Operation section. A
simple 12V test light with a ground
lead or volt meter 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.
When directed to check for 12V,
ground the test lamp lead or volt
meter 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 suffi cient current.
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