5
SET-UP
1. With meter disconnected from cable, plug 7-way connector to back of vehicle.
2. Bring other end of cable and tester into driver's compartment, leaving
tester disconnected.
3. Set Emergency Brake.
4. Turn Vehicle Engine ON and let idle.
5. KEEP FOOT OFF BRAKE. ONLY AFTER engine is running, plug the 9-pin
connector to the socket of the tester and lightly tighten the thumb screws.
6. Verify 12V circuit is powered or turn on Tail/Tag Circuit.
7. Wait for yellow ECU detection light to stop blinking.
8. For vehicles equipped with integrated controllers, look for the words
"Trailer Connected" on your instrument panel and the ECU Detection
light to remain steady within a few seconds of connecting the #9107A
to a vehicle with engine running.
9. Set-up is now complete.
ALTERNATIVE SET-UP PROCEDURE
In 2016 and 2017 models, some OEMs changed the way the brake control-
lers search for a trailer signal. To establish a “Trailer Connected” message
with these vehicles if the basic method described above does not work,
press and hold the brake pedal during #7 of the Set-up Procedure. May not
work on GM model years ranging from '07-'10.
TESTING
1. With the #9107A connected and engine running, increase the brake force
adjustment on your instrument panel to maximum output (usually #10).
2. Without applying pressure to the brake pedal, operate the manual brake
lever on your controller and take note of the number of LEDs that illu-
minate. It is recommended to maintain application for up to 20 seconds
and observe any changes.
3. Release the manual brake lever and apply moderate pressure to the
brake pedal. Observe the series of 10 LEDs at the top of your tester as
they sequentially illuminate. This indicates the extent of 12V power avail-
able at the connector to actuate trailer brakes.
4. While increasing brake pressure, you should see more of the 10 LED
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