Purkeys DIRECT PLUS Setup guide

A MISSION CRITICAL ELECTRONICS BRAN
D
DIRECT™PLUS
DIAGNOSTIC GUIDE
300-48 R1.01

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CONTENTS
Cover Assembly..................................................................................................2
Interior Light Module (optional) .....................................................................2
Connections Inside Nosebox............................................................................3
Connections Outside Nosebox.........................................................................3
Wire Diagram .....................................................................................................4
Basic Troubleshooting .......................................................................................4
No Lights on Face of the Nosebox..........................................................4
Batteries Not Being Charged ...................................................................6
Interior Lights Not Working (if installed)...........................................11
Limited Commercial Warranty Policy...........................................................13

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COVER ASSEMBLY
INTERIOR LIGHT MODULE (OPTIONAL)

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DIRECT PLUS DIAGNOSTIC GUIDE
CONNECTIONS INSIDE NOSEBOX
CONNECTIONS OUTSIDE NOSEBOX

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Step 1: Make sure that connections
are tight and inspect wiring for
defects.
BASIC TROUBLESHOOTING
Step 2: Check the 2 amp fuse in
the battery box at the DC/DC
converter.
• If blown , replace
• If good, proceed
WIRE DIAGRAM
NO LIGHTS ON FACE OF THE NOSEBOX

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P: 479.419.4800 | F: 479.419.4801 | www.purkeys.net
DIRECT PLUS DIAGNOSTIC GUIDE
Step 3: Using a voltmeter, measure
the voltage at the 2-pin terminal
strip on the DC/DC converter
charging plate:
• Place the positive lead on the
ligate batt+ stud.
• Place the negative lead on the
ground stud.
• If there is a battery voltage
reading, skip to step 5.
• If no voltage is shown, proceed
to step 4.
Step 4: Check the 30 amp circuit
breaker using a voltmeter:
• Place the positive lead on
the circuit breaker stud that
connects to the red junction
stud closest to the DC/DC
converter on the plate.
• Place the negative lead on the
negative post of the battery.
• If there is a battery voltage
reading, proceed to the next
step.
• If no voltage is shown, reset the
circuit breaker.
• If there is still no voltage, check
wiring for defects.
• If no defects are found, replace
the circuit breaker

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BATTERIES NOT BEING CHARGED
Step 1: Connect the tractor 7-way
cable to the trailer and start the
tractor.
• Place the voltmeter positive
lead on the stud labeled
positive input.
• Place the negative lead on the
negative battery post.
• If there is a voltage reading,
proceed to the next step.
• If there is no voltage reading,
skip to step 8.
Step 5: On the front of the trailer,
remove the hardware holding the
cover assembly to the nosebox
base.
• Place the voltmeter positive
lead where the orange wire is
connected.
• Place the negative lead where
the white wire is connected.
• Check the battery voltage
reading.
• If there is a battery voltage
reading, replace the cover
assembly on the base.
• If there is no voltage reading,
inspect the wiring for defects
and repair any issues.

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DIRECT PLUS DIAGNOSTIC GUIDE
Step 2: Next:
• Place the voltmeter positive
lead on the yellow wire stud
labeled ignition.
• Place the negative lead on the
negative battery post.
• Battery voltage should read
approximately 10-13 volts.
Step 3: Unplug the 4-pin connector
from the DC/DC converter.
• Place the voltmeter positive
lead in pin #1 (12v + input).
• Place the negative lead in pin
#3 (ground).
Readings should be approximately
the tractor voltage:
• If yes, go to the next step.
• If no, inspect the wiring and
plug.
Step 4: Next:
• Place the voltmeter negative
lead in pin #3 (ground).
• Place the positive lead in pin #4
(ignition).
Reading should be approximately
10-13 volts.
• If yes, go to the next step.
• If no, inspect the wiring and
plug.

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Step 5: Next:
• Place the voltmeter negative
lead on the negative battery
post.
• Place the positive lead on the
red junction stud closest to the
converter.
Reading should be 13+ volts.
• If yes, proceed to the next step.
• If no, replace the wiring from
the converter to the converter
plug.
Step 6: Next:
• Place the voltmeter negative
lead on the negative battery
post.
• Place the positive lead on the
circuit breaker post away from
the battery.
Reading should be 13+ volts.
• If yes, proceed to the next step.
• If no, inspect the wiring
between the junction stud and
the circuit breaker and repair
any issues.