Works with both the common 7 way and 4 way trailer plugs used on most SUVs trucks, trailers and RV's.
Check the Trailer plug on your SUV or truck!
Ever try to fix your trailer lights only to find a blown fuse on your vehicle!
Plug this tester into your trailer plug on your SUV, truck or RV.
Takes the guess work out!
This 7-way and 4 way flat tester can check all the trailer light circuits on your vehicle.
Confirms you have the 12 volt power supply (often needed to charge camper batteries or operate interior lights on cargo trailers) which often blow fuses
Also Checks your Truck Electric Brake Controller!
If the LED lights light up on this plug, you know it is not the vehicle.
If you were wondering how to decode tester it is as follows:
Location identified looking into your vehicle plug with lid open
LT - Left Turn/Brake (9 o clock)
TM - Tail/Marker lights (11 o clock)
RT - Right turn/brake (3 o clock)
12V - Charge terminal (1 O clock)
BK - Brakes out put (5 o clock)
BU - Back up lights (Center pin)
FYI - 7 o'clock is ground - Tester will not work if the terminal is not hooked up.