Originally Posted by Francesca Knowles
Have you used the amp probe to find 12v wires?
My husband has one and we couldn't make it work on the trailer 12v system.???
I used my Extech in RV and at home on any wire, alarm, 120V conduit, LAN, etc. None of these tracers would work on a 12V circuits if tone generator
is not properly connected to the wire to be traced. Line voltage, such as 12V DC or AC, will not trigger the receiver, it is the tone transmitter properly connected to the wire to be traced which emits the signal detectable by the receiver. If you had problem with your unit I would assume you had a defective tracer. These tone tracers are very common tools.