oliver1555
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The black and white wire (duplex) circled in green goes to your brakes. Both axles or just one? Put an ammeter in series with the blue and black wire circled in red and see how many amps it pulls 7 (2) -16 (4) with the truck brake applied. Put an ohmmeter across the black and white (disconnect one side) and you should see about 16 ohms of resistance. A fairly quick test is jack up one side spin the wheels and hit the brake. See if the tires stop, while holding the brake, does View attachment 807645the tire turn easily by hand?
I’m guessing that your Ram isnt the issue. Does it work with a different trailer?
Great, half the battle. Now all we have to do is follow the black and white wiring trail, probably a bad splice wherever they jumped in both axles ( splices usually on drivers side of trailer) or bad ground point on one of the 2 wiresOn my big GN trailer, the brakes work perfectly. It’s something on the smaller trailer itself.
The small trailer has brakes on both axles.
The brakes do work, but they are weak, like maybe 30% of what they should be.
I dont see a dedicated ground wire from trailer frame to truck so where are the lights and brakes grounded? Hate when they drive in a self tapper and call it good.Thanks. I am going to unload the mowers and try to start looking today. I had a feeling it would be a bad ground or wire splice.
Wouldn’t that be in the 7-pin plug?I dont see a dedicated ground wire from trailer frame to truck so where are the lights and brakes grounded? Hate when they drive in a self tapper and call it good.