3
SET-UP
1. With the meter disconnected from the cable, plug the 7-way connector
into the back of the vehicle.
2. Bring the other end of the cable and the tester into the driver's
compartment, leaving the tester disconnected.
3. Set the emergency brake.
4. Turn the vehicle engine ON and let it idle.
5. KEEP FOOT OFF BRAKE. ONLY AFTER engine is running, plug the 9-pin
connector into the socket of the tester and lightly tighten the thumb screws.
6. Verify the 12V circuit is powered or turn on the Tail/Tag circuit.
7. Wait for the 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 #9107B
to a vehicle with the engine running.
9. Set-up is now complete.
ALTERNATIVE SET-UP PROCEDURE
In 2016 and 2017 models, some OEMs changed the way the brake controllers
search for a trailer signal. If the basic method described in the set-up procedure
does not establish a “Trailer Connected” message with these vehicles, press
and hold the brake pedal during step 7.
TESTING
1. With the #9107B connected and the engine running, increase the brake
force adjustment on the instrument panel to maximum output (usually 10).
2. Without applying pressure to the brake pedal, operate the manual brake
lever on the controller and take note of the number of LEDs that illuminate.
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 the tester as they
sequentially illuminate. This indicates the extent of 12V power available at
the connector to actuate trailer brakes.
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