Douglas Dynamics Western 26470-2 Betriebsanleitung - Seite 6

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ISOLATION MODULE TEST PROCEDURE – ALL MODULES

TEST PREPARATION

CAUTION
Read this document before testing any
snowplows.
•
When connecting the Isolation Module Tester to
the battery, connect the red clip to the
POSITIVE (+) terminal and the black clip to the
NEGATIVE (–) terminal. Connect the black clip
last. When disconnecting, disconnect it first.
•
If an Isolation Module Tester lamp (tester lamps
are white, tester LEDs are green and slightly
smaller) does not come ON, the fault could be an
open lamp element, an open circuit, or both.
•
All vehicle lamps must be operational. An open
lamp may cause false test results.
•
The Isolation Module Tester is protected by a fuse
inside the tester that automatically resets itself. If
the fuse activates, disconnect power from the
Isolation Module Tester and wait several minutes.
Then resume the test.
Lit. No. 26473, Rev. 03

ISOLATION MODULE ON-VEHICLE TEST

Set Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Isolation Module Tester Switch
POWER
PARK LAMPS
HEADLAMPS
PLOW ATTACHED
IGNITION SWITCH
HEADLAMP COMMON
HIGH BEAM #2
DEDICATED DRL BULB SYSTEM
Connection
Connect the Isolation Module Tester to the Isolation
Module as follows:
1. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
2. Connect the Adapter Cable (PN 26472) to the
Isolation Module Tester harness 2.
3. Connect the molded connector of the Adapter Cable
to the vehicle lighting harness connector located at
the grille of the vehicle. Isolation Module Tester
harnesses 1, 3 and 4 are not used for this test.
Test Procedure
1. Turn the vehicle's ignition ON, but do not start
engine. Verify the vehicle's lights function properly
by cycling the vehicle's park, turn, hazard, high
beams, low beams and DRL lamps. Then place
the vehicle's headlamp switch in the "low beam"
position. Turn OFF all vehicle lighting. Repair or
replace any defective vehicle lamps before
proceeding.
2. Turn the Isolation Module Tester POWER switch
to the "ON" position. Only the POWER indicator
should light.
6
Position
OFF
OFF
LOW
NO
OFF
NEG (–)
OFF
OFF
November 1, 2007