Is there no power to my trailer when I plug in wire harness?
No power to my trailer when I plug in wire harness? Truck is a Ford F150, 2012, 4X4, crew cab. Have Ford questions? Ask a mechanic for answers ASAP
What to do if your trailer has no power?
If they are clean or still no power after cleaning, I would check your grounding connections. Make sure your grounds are firmly connected to a clean, bare metal surface. Next, test the pins on the connector where the wiring harness plugs into the truck using a circuit tester like Item # 40376.
What does 12 volts mean on trailer plug?
If the pin wiring for that is working correctly you should see 12 volts appear on your screen. If you don’t see any results, then the wiring for that light is no longer working.
How to test 7 pin trailer plug with multimeter?
You can insert the black probe into the bottom left slot of the 7-pin plug as that is the grounding wire. Insert the red probe into the top right slot of the plug. If you are getting a reading near to 12 volts then it means that electricity is flowing in and out of the plug normally.
Is there no power to the trailer plug?
There is no power on the 4 or 7 pin plugs. I tested all with a meter. They worked the day before. I have checked 3 fuses in the passenger compartment fuse panel in the truck #13,14,and 15. I have checked 6 fuses in the power distribution box under the hood #22,26,29,74,75, and 100.
If they are clean or still no power after cleaning, I would check your grounding connections. Make sure your grounds are firmly connected to a clean, bare metal surface. Next, test the pins on the connector where the wiring harness plugs into the truck using a circuit tester like Item # 40376.
Where to plug in 12V trailer tow battery?
If yours are empty like mine were, go get two relays and plug them in. Then get a 30A Maxi Fuse and plug it into position 16 in the under hood fuse box. 16=Trailer Tow Battery Charge. This should give you power to your orange wire (switched 12v) on your 7 pin trailer harness.
How to troubleshoot no power at the factory plug?
Next, test the pins on the connector where the wiring harness plugs into the truck using a circuit tester like Item # 40376. This will tell you if the problem is on the wiring harness or somewhere deeper in the truck’s wiring. If everything checks out with the pins then the problem is on the harness and it can be replaced with Item # 30955.