TRAILER TESTER INSTRUCTIONS
The Trailer Tester (Part #8010) is designed to help you quickly identify problems in the wiring of the trailer such as
opens, shorts, incorrect wiring, etc. This is done by testing the Left Turn, Right Turn, Tail/Marker, Brake and Back
Up circuits on the trailer, by indicating the approximate amount of current used in each circuit. It will also test the
voltage of the external battery connected to the trailer charge circuit (i.e. trailer battery).
NOTE
The above LED light reference numbers are used in the following instructions for all rows.
READ THIS FIRST
Read and follow all trailer warnings and installation
instructions before continuing.
1. Check to see that the mating surfaces of the trailer wiring
connector matches the Trailer Tester connector. All connector
surfaces should be clean and free of dirt. For proper operation,
make sure the trailer tester battery is fully charged. Plug the
trailer connector firmly into the Trailer Tester. Be sure that the
connector is fully inserted.
2. Turn the switch on. All LEDs will cycle in order from top to bottom
and left to right and will flash once. The tester is ready for use.
3. INDICATOR "LED" LIGHTS – POWER ROW ONLY
(Measuring the internal battery of the tester –
LED will remain lit after power has been turned on)
• Green LEDs 2, 3 and 4 mean that the internal battery
is OK to perform tests.
• Red LED 1 flashing means that the internal battery
needs to be charged (see "Charging the Internal Battery"
instructions below) or may need to be replaced.
• Red LED 5 indicates that the battery is faulty
or overcharged. Battery may need to be replaced.
4. CHARGING THE INTERNAL BATTERY
CAUTION
ONLY USE THE CHARGER (part no. 8008)
PROVIDED WITH THE 8010 TESTER
• When the charger is plugged into the charger socket,
Red LED 5 on the Power Row flashes if the unit is ON.
• If the unit is OFF, no LEDs will be lit, but the battery
will still charge.
• The LED on the charger is RED while charging.
• The LED on the charger will turn GREEN when
the battery is fully charged.
NOTE
The trailer tester will not function while the internal
battery is being charged.
5. MANUAL AND AUTO TEST – LEFT/STOP,
RIGHT/STOP, TAIL, BRAKE, BACKUP CHANNELS
AUTO TESTING (measuring the amount of load
on each channel):
• Press the AUTO TEST button. When pressed,
its indicator Green LED begins to flash.
• Each channel will be tested from top to bottom.
• Red LED 5 will flash as its channel is tested.
• Green LED(s) will remain ON to indicate the amount
of load. (See Step 6 for LED display load readouts)
• See Step 7 for LED fault indication readouts.
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P/N 8007
Rev. C
09/12