Trailer Light Test Box- How to Build

[@ernestmartinezjr4426]

Thanks I’m going to use this when I hook my trailer up to my golf cart

[@3DOutdoors]

Thank you.

[@mickodonnell890]

Great inspirational video. Been looking the last couple of days for ideas on a box exactly like this for my caravan. Although we have different connectors it's the same thing, so I'm now creating a list for my next wee project!! Cheers and greetings from Scotland 🙂

[@girlmastergeneral]

Wow! Saved me $200 bucks on a commercial product! Thanks a million!

[@3DOutdoors]

Glad it helped!

[@RustyGlovebox]

That is a valuable tool. Save you a lot of trouble and time before a trip.

[@3DOutdoors]

For sure.

[@nenengalma]

great sharing electrical connector sid good job sharing idea

[@3DOutdoors]

Thank you.

[@Bits-of-Bytes]

I like it. Nice and simple. I believe you could put a simple 2 pin 12v blinker relay in-line with each of your right turn and left turn switches and end up with blinking lights.

[@3DOutdoors]

Thank you.

[@nathangraham_clips]

Idk why - but everything is better with some nice switches - cool box :D

[@3DOutdoors]

Thank you

[@PlayNewApp]

Hello, my friend. 🤗 💕 Awesome upload. 👍 Have a good weekend. 😘 ✨

[@3DOutdoors]

Thanks for visiting

[@TeamTerrill]

Wow this was very informational... Awesome share!

[@3DOutdoors]

Thank you.

[@mikeydipaolo591]

@@3DOutdoors Would this work on a 53' semi trailer?

[@LipstickNsofrito]

Great idea! Thanks for sharing this with us...have a blessed day🤗

[@3DOutdoors]

Thank you.

[@joecnc3341]

Great video! Thank You!

[@3DOutdoors]

Thank you.

[@TheMrbombastic13]

Hi, I'm interested to build one and your design is simple and effective. Is there a need for a fuse in the box if there is a short circuit somewhere in the trailer?

[@mikecox5700]

How does the brake test work? I would like to make this, but need to set an adjustable timer on the brake circuit so when it is on, the brakes will engage with the electromagnet every 3 to 4 seconds and then disengage. If you spin the wheel while the axle is elevated, you can test the brakes if working correctly.

[@3DOutdoors]

Sounds good.

[@mikecox5700]

I built my own several months ago, thank you! kzbin.info/www/bejne/fmrJZ2Z_qNuHldk

[@BOHEMIANHUNTINGCLUB]

Nice job on that, that would definitely be very handy!

[@3DOutdoors]

Thank you

[@jeffaschbacher3334]

Great idea, thanks for sharing.

[@3DOutdoors]

Thanks for watching!

[@buzzsah]

Good idea, can even be used to wire a trailer.

[@3DOutdoors]

Thank you.

[@TommyMillerVlogs]

Awesome Sauce!! Left a big like!!👍 # 10 I need to make me one, last year I did 4 boat trailers and 2 16' trailers for my friends...

[@3DOutdoors]

Thanks 👍

[@mitchelldavey1235]

Hi there just wondering where do you put the + and - on the battery to the switch cheers

[@3DOutdoors]

Most switches have an indicator, but they are simply a devise that opens and closes a conection.

[@BB-ls8ms]

Hey Dan. Great video! Followed your instructions. Tester showed box was working, now it’s not. Any ideas on why it would work after set up and not now? I haven’t even hooked it up a trailer yet. Could I have done something ti burn out the switches?

[@3DOutdoors]

The first think I would do is take my tester and hold the negative side on a battery, so you know you are getting grounded and then check at each switch to see if you have power to them. I am guessing that you have either a bad connection on the positive someplace or the ground ended up coming loose in the trailer connector or on the clip you are using to hook up to your battery.

[@BB-ls8ms]

@@3DOutdoors Hey Dan. Switched out the switches to a marine style with lights to see if there is power at the switches first. They all came on now won’t come on again. I’m definitely missing something. Is there a way to send a photo to show you how I have it hooked up. Should I have a fuse or something? Maybe I burned two sets of switches out?

[@marshallalice6316]

I see he didn't add fuse blocks so if you have a grounded light no fuse to save something getting burned up

[@robertjohnson8219]

@@marshallalice6316 looks like a fuse on the red line off the battery

[@train4905]

Exellent build sir

[@3DOutdoors]

Thank you.

[@gustavooliveros6394]

How do I get the turn signals to flash on and off? I bought a relay flasher and it doesn’t do anything.

[@3DOutdoors]

Don't know, I didn't put a flasher in mine. I just use the switch, if it comes on with the switch it will come on when I use my turn signal. I am just testing if it works.

[@Pyro17059]

If your lights are LED, a regular flasher will not work because the LEDs do not pull enough amperage.

[@JohnAmes]

That is very cool my friend big like 👍

[@3DOutdoors]

Big thanks

[@7eis]

Made a similar one but for European 13 pin. Also made a vehicle plug tester from 4 compact rear light clusters (2 bulbs 2 LED, this is needed because some vehicle electronics don't play nice with led but might work going with bulb) and separate bulbs for conductors not used for lights. Long cable so I can troubleshoot from the cab - the long cable is connected to the lights with an old school pvc connector strip where I cut down the surrounds for the screws so i can clip on to them. Has a cigar lighter cable to add a known good ground. Test everything from the drivers seat

[@3DOutdoors]

Thank you.

[@mdmelbourne6076]

Thanks for sharing this Dan, Great idea 💡 👍

[@3DOutdoors]

Thank you.

[@CraigSiderio]

I'd like to see a better diagram of the wiring. It would better explain how the running lights are on when the brake or turn signals operate .

[@3DOutdoors]

Thank you.

[@COJ.Island]

Wow super cool project ❤️

[@3DOutdoors]

Thank you.

[@TommyMillerVlogs]

Rewatch, Brother!! 💯👍

[@3DOutdoors]

Thank you.

[@TommyMillerVlogs]

@@3DOutdoors Welcome!!

[@nicolacristi]

great info

[@3DOutdoors]

Thanks for watching!

[@poormansstack]

Nice to have.

[@3DOutdoors]

Indeed!

[@nicolacristi]

pretty intersting)

[@3DOutdoors]

Thank you.

[@TommyMillerVlogs]

Stop by to show some love and support!! 💯👍

[@3DOutdoors]

Thank you

[@WaynJul]

A quick way to test your bulbs and wires.

[@3DOutdoors]

It sure is.

[@barntt]

Like any DC powered item this needs about a 3Amp Fuse in the POS+ wire going to the battery to prevent a fire or shorted out connection from burning something up! Come on Man! LOL

[@3DOutdoors]

Thank you

[@ObelixMagnetFishing]

Even if I no longer drive a passenger car or an 18-wheeler, it is actually very easy to check your lighting, which also saves you the necessary fines. And the fines you receive today are not cat piss (Dutch expression) in other words, it can cost you a fortune these days. Share your finding here and there

[@3DOutdoors]

Thank you