Posted by Gene Davis (Ga.) on October 19, 2021 at 17:21:42 from (172.242.36.29):
Good evening people. I am adding trailer brakes to my 2009 F-150 truck so I can have brakes on both axles of my new trailer to haul my tractor on now. I have run into a problem that has me sorta stumped. The truck does not have a factory towing package so I have had to add the brake controller and all wiring to it. I got that installed and am using a 7 way RV type plug on both the trailer and the truck. The truck already has a factory flat 4 way trailer light plug just left of the center of the rear bumper. I installed a class 3 hitch on the truck and I am using a 7 pin RV connector unit at the rear of the truck . The 7 pin unit has an adapter that you plug into the flat 4 pin connector for the lights. Now for the problem. With everything connected up I only have power to the tail lights on the trailer,no turn nor stop lights. Tail light power at 4 way flat and 7 pin RV connection good , ground is to the frame of the truck and shows less than 1 ohm resistance on the meter when checked. All functions good on the truck. I checked the wiring and connections as far as I could follow them above and past the spare tire on the left side rail. It doesn't appear to have any current for those lights coming to the plug from the front of the truck. Went on line and checked around and the suggestions seemed to say that there are a couple of relays or something in the fuse box that has to be installed. Any body have any idea about this. This is my first Ford since about 1967 model year and I need rescuing if possible. The Ford dealer here only has a couple of guys that can change oil and maybe put on a tire but nothing serious. This is aggravating and I want to get it finished up. Thanks in advance for help. Gene Davis Tennille, Ga.
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