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Thanks danemayer. I do not have a volt meter, just a little 12v check light. But I can confirm left and right signal lights and running lights are getting power to their respective pins in the 7 pin connection on the truck. Yes, the batteries get charged when we are plugged in at a campsite.

Thank you for replying Flick. I tried hooking up, engine running , depressing brake but still no 12v to my 7 pin. also, if it's working properly, should'nt I be able to plug in and run my trailer's 12v electrical from the truck? Even if trailer batteries are dead? Thanks again for any help David

Hello all, first post here. I have a 2011 Ford f150 with the tow package. I am not getting 12 v at my 7 pin plug so the trailer battery is not charging. I have installed the relay and 30 amp fuse required in the power box under the hood, but still no 12v at the 7 pin. Is there another fuse I am...