POWER PRO BETEK Power Probe 3EZ Manual De Instrucciones página 13

TRAILER LIGHT CONNECTIONS
1. Connect the PP3EZ to a good battery.
2.Clip the auxiliary ground clip to the trailer ground.
3. Probe the contacts at the jack and then apply voltage to
them. This lets you check the function and orientation of the
connector and trailer lights. If the circuit breaker tripped, that
contact is likely a ground. Reset the circuit breaker by letting
it cool down (15 sec.) and depressing the reset button until in
clicks into place.
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