Simple trailer brake test
I do this test before each trip: I have a brand new trailer with all 4 brakes presumable working. Unless you have some sort of fancier brake controller all your controller will tell you is that at...
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Pretty much not worth the effort.
Very few "ohm" meters can actually read ohms less than say 10 "accurately", not even most Flukes can do this.
I have one of the very first Radio shack DVMs which has a low ohms zero adjustment (25+ years old) and unless you have that adjustment your meter will be 1-3 ohms off. I also have a 40+ yr old analog Triplet meter which also has a low Ohms offset adjustment.
Just short your leads together, pretty fair chance you WILL get a reading of 1-3 ohms which WILL be added to your reading (offset).
In other words the reading you get you WILL need to SUBTRACT the offset resistance you got when shorting the leads together.
Your BEST way to check is to take an AMMETER and connect it in series with your breakaway switch. Pull the breakway and take your reading and if all is well you should get around 11-12A draw..
But really, that is over the top worry for nothing.
If you are this concerned then I would suggest redoing all the factory splices at the brakes with weather proof connections then wire tie the wires to the axles to prevent movement. Chances are if you do that you will never experience any broken connections for the life of your trailer.
Very few "ohm" meters can actually read ohms less than say 10 "accurately", not even most Flukes can do this.
I have one of the very first Radio shack DVMs which has a low ohms zero adjustment (25+ years old) and unless you have that adjustment your meter will be 1-3 ohms off. I also have a 40+ yr old analog Triplet meter which also has a low Ohms offset adjustment.
Just short your leads together, pretty fair chance you WILL get a reading of 1-3 ohms which WILL be added to your reading (offset).
In other words the reading you get you WILL need to SUBTRACT the offset resistance you got when shorting the leads together.
Your BEST way to check is to take an AMMETER and connect it in series with your breakaway switch. Pull the breakway and take your reading and if all is well you should get around 11-12A draw..
But really, that is over the top worry for nothing.
If you are this concerned then I would suggest redoing all the factory splices at the brakes with weather proof connections then wire tie the wires to the axles to prevent movement. Chances are if you do that you will never experience any broken connections for the life of your trailer.
