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Brake light on trailer wiring
Be VERY careful about tapping into new car/truck wiring. Modern electronics are extremely sensitive to amp draw, and could result in damaged control module. On my '03 Ram which has a factory installed hitch and trailer package. All the trailer-related fuses are separate from the vehicle circuits. That means, say, if the truck's tailights don't work, the trailer's still will and vice versa.
I'd get a factory-approved trailer connector from the dealership which will have instructions.
BTW, you're missing the electric brake circuit (which means you'll need an electronic brake controller too), and the constant-on 12v circuit to charge the trailer's break-away battery if it falls into USDOT regulatory territory.
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Brake light on trailer wiring
On paper, maybe.
Seriously, it depends on the type of circuit, namely if you have a similar type bulb that you're connecting to. It's been years since I have to cut-and-cobble (non-factory install) but I can remember having to use a separate electronic module that took the signal from the turn and stop lites (both single filament) on the vehicle (I think it was a foreign car that had separate turn and stop lites---I think). The module then transformed the signal to a usable one compatible to a single double-filament bulb. And you have to keep in mind that the stop lite may or may not be/have a running lite with a double filament or single if a running lite is also separate.
Again, it's much safer and easier to get a connector from the dealer that may even simply connect to a harness under the dash---and in some cases the trailer wiring is already run through the vehicle waiting to be connected to it. Another option is Hoppy. They are the major player in trailer wiring. I've used them before with great success. Tractor Supply carries them too. In most cases all you do disconnect the harness near the tailights, insert the Hoppy connector and reconnect the car harness (about 2 minutes total). If I'm not mistaken they also offer one of those electronic modules that manages the conflicting bulb signals--and (I think) it simply plugs into the Hoppy connector. Couldn't be simpler IMHO.
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Brake light on trailer wiring
Have you checked for a loose nut behind the steering wheel?
Kenny T. in SC has found the same loose nut behind the wheel of his pickumtruck for many years now. Iareckon he's taken a shine to himself...errrr...the ol' nut.
But he's a good nut.
Or was it that he had a loose screw? hmmmm
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Brake light on trailer wiring
Kenny my "American" Dodge Ram was built in Mexico.
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