PhillyPhan
Well-Known Member
Just hooked up a boat I picked up and for some reason I have no trailer lights. Last week when I towed a boat they worked fine. The difference between last weeks boat and this weeks was the one that worked used the 4 pin plug. The one that's not working now uses a 7 pin plug. I checked all my fuses that I know of and they were good. Voltage readings below.
Measurements are with the truck on:
4-Pin Connector
Pin 1 = Ground
Pin 2 = 0V (Tail/Run)
Pin 3 = 12V/0V as left blinker is activated or solid 12V when brake is pressed.
Pin 4 = 12V/0V as right blinker is activated or solid 12V when brake is pressed.
7-Pin Connector
Pin 1 = Ground
Pin 2 = 4.6V (Brakes)
Pin 3 = 0V (Tail/Run)
Pin 4 = 12V (Aux/Charging)
Pin 5 = 12V/0V as left blinker is activated or solid 12V when brake is pressed.
Pin 6 = 12V/0V as right blinker is activated or solid 12V when brake is pressed.
Pin 7 = 0V (Backup)
I'm wondering if I should have voltage at Pin 2 of the 4-pin connector and Pin 3 of the 7-pin connector. Any help is much appreciated.
Measurements are with the truck on:
4-Pin Connector
Pin 1 = Ground
Pin 2 = 0V (Tail/Run)
Pin 3 = 12V/0V as left blinker is activated or solid 12V when brake is pressed.
Pin 4 = 12V/0V as right blinker is activated or solid 12V when brake is pressed.
7-Pin Connector
Pin 1 = Ground
Pin 2 = 4.6V (Brakes)
Pin 3 = 0V (Tail/Run)
Pin 4 = 12V (Aux/Charging)
Pin 5 = 12V/0V as left blinker is activated or solid 12V when brake is pressed.
Pin 6 = 12V/0V as right blinker is activated or solid 12V when brake is pressed.
Pin 7 = 0V (Backup)
I'm wondering if I should have voltage at Pin 2 of the 4-pin connector and Pin 3 of the 7-pin connector. Any help is much appreciated.