Power Probe 1 - Manual (Page 8)

T
ESTING
T
RAILER
L
IGHTS AND
C
ONNECTIONS
1. Connect the Power Probe to a good battery.
2. Clip the auxiliary ground clip to the trailer ground.
3. Probe the contacts at the jack and apply voltage to them. This lets you check the function
and orientation of the trailer lights. If the circuit breaker tripped, reset it by depressing the
reset button.
7