Today im going to show you how to test the functionality of a trailer four way connectors. To test if any of the wirings in the 7 pin plug is not working you will need to use your digital multimeter and ensure it is capable of testing for volts.
Electrical Troubleshooting Using A Multimeter Boatus Magazine
How to test trailer wiring with a multimeter. Next insert your black lead into the com port and your red into the voltage port. See part 2 checking lighting system with an ohm meter. This method allows testing without a tow vehicle present and allows the tow vehicle to be eliminated as a possible. Disconnect the trailer from the vehicle and run a test to determine if the trailer lights function properly. If you are wanting to use a multimeter to test the 12 volt system on your vehicle when you are installing the curt t connector wiring harness part c56165 you would set the multimeter like part btmt15 to 20 on the dc side. Turn your multimeter to the v symbol on a multimeter dial.
Using a multi meter to troubleshoot and check the voltages and grounds on a trailer light connector. What youre going to need to do this is a circuit tester and a buddy in the drivers seat to operate the. Then touch the black wire on the multimeter with the same colored contact under the light at the back of the trailer. How to test 7 pin plug with a multimeter. So disconnect the trailer plugs and use the wires on the pin to help you identify the specific pinholes you want to test. I have attached a photo of the btmt15 and have noted where the test position is.
All you have to do is link up the white wire to the negative and the colored wires to the positive. To test the other wires detach the multimeter from the green contact in the trailer plug and reattach it to whatever contact you want to test. For a trailer light test without a vehicle you would need some wires to attach your plugs to the battery. A quick and easy way to test the lights on any trailer with a flat 4 connector. It is still a simple process but in this case you would have to power your trailer light them with a vehicle battery. If the trailer lights function with such a setup it is clear the issue is.
This will take the reading for a system that has 0 to 20 volts. Wire the vehicle side wiring harness to a standalone battery.
Gallery of How To Test Trailer Wiring With A Multimeter
