Ranger, didnt you mean grounding from the battery - post?????? and tapping hot feeds off the + post of course????
When I want a sure fire trailer and brake connection I use for the hot feed a 30 amp circuit breaker tapped from the + battery terminal connection then use 10 gauge stranded insultated (well DUH) wire to my loads such as the trailer connectors auxiliary hot voltage feed terminal and to the input feeder for an electric brake controller etc etc. Of course, there are hot feed terminals under the hood which would be about as good provided alllllllll connections are good and Id still use the 30 amp circuit breaker
As far as grounding a trailer via the connectors truck mounted receptacle, I like to weld a stainless steel bolt to a main frame member and use it as the grounding terminal for a wire to the trucks receptacle. Of course, one could run a 10 gauge wire allllllll the way back to the trailer connector from the batterys - post, but if the connections are all good (like my welded SS bolt) using the frame as a conductor should drop less voltage then a 10 gauge wire.
Grounds are soooooooooo important as far as trailer lights and its electric brakes which is why I like a dead grounded frame member take off (my welded bolt) for connecting ground wires like to the trailer wiring receptacle. Similar, I like a stainless steel bolt welded to the trailers frame for its ground and ground wire connections.
As far as wiring, I like to use the cripmed on connectors BUTTTTTTTTT then also solder them for a super good electrical connection. I DO NOT LIKE OR TRUST any of those cheap scotch lock type push/crimp on wiring connections for trailer wiring, its best to butt splice n solder or even use twist on wire nuts with silicone sealer versus those push/crimp connections.
Its not really all that much work or expense to do it right (soldered connections and welded ground frame bolts etc) the first time on BOTH the truck n trailer (you want perfect grounds everywhere) and then have trouble free use for a long time. I try n keep my trailer receptacle n plug clean n sealed where necessary also.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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