Esting, Railer, Ights and – Autel PowerScan PS100 User Manual
Page 14: Onnections, 5 testing trailer lights and connections

13
Figure 11
If the green LED went off at that instant or if the circuit breaker 
tripped, the tool has been overloaded. This could happen for the 
following reasons: 
 The contact you are probing is a direct ground or negative
voltage.
 The component you are testing is short-circuited.
 The component is a very high current component (i.e., starter
motor).
If the circuit breaker is tripped, reset it by waiting for it to cool down 
(15 sec.) and then depressing the reset button. 
3.5 Testing Trailer Lights and Connections
While the tool in DC Voltage mode, clip the auxiliary ground lead to 
the trailer ground, probe the contacts at the jack and then apply 
Contact the tip to the 
positive terminal of the 
bulb 
Connect the negative 
auxiliary clip 
Press
the
power
switch forward to 
activate the bulb 
