Trailer lighting tester ?

[alwaysFlOoReD]

I want to make a self-contain trailer wiring/light tester. I have some vague ideas on how to construct such but am looking for input.

Goal; A self contained mobile unit that tests turn signals, parking lights, 4-ways, brake lights, brake function and maybe the accessory line. Plugs into the front of the trailer via 7 pin plug. Use adapters for 4,5, and 6 pin connecters.

I'm picturing using a hand truck with a car battery at the bottom, whatever sensors and meters at the top, and a remote with about 25 feet of cable.
The remote would have 1 on/off/on switch for left/right turn, 1 on/off switch for brake, 1 on/off switch for park, and 1 on/off switch for the accessory with led indicators. I believe I can figure out the relays and flashers to get this section up and running.

I would also like a circuit to test the electric brake function, and this is where my electronics knowledge falls short. Would I use an ammeter to test the electric brake function? How would I interprete the readings? How would I wire it up?

Any help or comments on my ideas appreciated.

Richard

 

[Doofy]

Spend $5-$10 at Amazon and be Happy. I wasted tons of money and a lot of time on little projects like this and the results, usually good....didn't mean much, in the long run. Time spent with Family and Friends is the better way to go. Didn't mean to rain on a good project but they usually end up costing more than you'd planned.

 

[RonD]

Electric trailer brakes can be tested for Continuity(OHMs) and/or AMPs, each magnet in a brake drum should draw 3amps or less, so single axle 6amps, tandem 12amps.

Each circuit will need an easy to change fuse, you could use circuit breakers but..........they do wear out if "blown" several times, so look at cost of replacement fuses vs circuit breakers.
I would also add an LED on each circuit, so you know power is indeed being sent out on that wire to the trailer wire.

And a Power LED so you know battery is connected and working