Wiring help need for taillights

So I'm trying to wire my flat bed conversion and I'm having some issues. My flat bed uses 4" round leds with Stop/Turn, Running, and Ground inputs.


On the driver side the wiring is:
Green - Running
Green/Black - Turn
Green/White - Brake
White/Black - Ground

Passenger side is
Green - Running
Green/Yellow - Turn
Green/White - Brake
White/Black - Ground

I combined the Turn and brake inputs from the wiring harness on the truck side on the respective sides to the Brake/Turn inputs on the 4" leds. And wired in the running input from the truck to the LEDs and the grounds.

The issue I'm having is that while the running and brake lights work as soon as I use the turn signals both sides engage as well as the 3rd brake light (blinking). When I hit the brakes both turn signal indicators on the dash engaged.

Obviously I've linked the circuits. Is there a way to get everythjng working properly? I'm trying to avoid wiring separate turn signals if possible. Here's a pic of what I'm trying to make work. Thanks in advance!

 

Your going to need one of those trailer converter boxes!!

What your doing is wiring trailer lights that happen to be on your truck.

Sadly the only way to make the lights with all the functions in one light work

 

You could buy European style trailer lights . They have the extra wires and lights.

Like Craig said you need to get a converter box.

 

I used this one for my trailer lights. They sell it at Autozone for an additional $10.00 if you need ASAP.

https://tinyurl.com/ybwp537d

 

another option is to buy orange or red slim LEDs and mount them to the slanted part for turns

 

I put a flatbed on my Dad's 95.5 Taco and I used these flat mounts. They wired right up W/O adapter and have been working fine since about Jan 2018.

https://tinyurl.com/y9uwz2ra

 

I think the OP has the lights installed already if that his truck

I go with the separate turn singles on my light installs

 

I am curious as to how the LED lights on your dad truck worked out of the box... LED's usually dont have enough resistance for the turn signal relay to operate properly.

 

I found on mine running two Led lights and two incandescent lights I did not have the Hyper flash .

Was it just a fluke caused by more resistance in the sockets ?? No idea .

 

Hey guys, thanks for all the input. So picked up a converter box for trailer lights but I'm still having some problems. Both the turn signals and brake lights work without the running lights on but as soon as the running lights are turned on the tailights turn a bright solid with no blinking. As soon as I kill the running lights I get the indicators and brake lights back. The front turn signals work fine.

I'm kind of stumped here.



Edit.

I checked both imput and output sides of the converter box with a test light and everything seems to working ok. Clean grounds, tight connections. Am I asking too much from these dual action led lights? It doesn't seem all that complicated for what I'm trying to do.

 

try hooking the "running" to the "stop/turn" instead and see if it is dimmer. ideally one should be less light and when you hit the brake or use the turn signal it is brighter. otherwise it may be over-powering on the amount of light and you will need different 4" rounds :/

 

Tried that and unfortunately it doesn't seem one set of leds is brighter than the other. I'm not seeing a whole lot of washout per se but I guess it would be hard to tell. Since these lights are made with a Turn/Brake, Run, and Ground I still don't see why they wouldn't work. They're supposed to be automotive. I even ran a dedicated heavy gauge wire from the flatbed directly through the frame so I know that's not the issue.

Edit. Also it doesn't get any brighter when the brakes are applied with the running lights on. It's almost like all leds are activated when the headlights are on while half are indicated when the running lights are off.

 

So it looks like all LEDs are activated when running lights are on and overpowering the flash and brake input.

 

Were your lights labeled as to what wires were which ??

when you tested the lights prior to installing them did you see a major difference between the tail light and brake light when energized ?

Poor quality lights malfunction out of the box?

Your using the light harness from the truck or is it all custom from the cab back ?

Grounding the lights via the harness or the rear of the truck without a ground to the frame at the battery might not be the best.

Having done many trailer light installs I always run a extra ground from the battery to the frame just to get a good ground on the rear of the frame.

Some where the brake light and tail light circuit joined together might be in the light itself.

Hard to trouble shoot remotely .

 

Thanks for the info. To answer your questions:

There is a clear difference in the brightness between Run and Brake/Turn a s they're labeled as such.

Stock wiring accept for the trailer light box that's converting 5 wires into 4. I light tested the input and output wires and they are showing proper function.

I do have a dedicated ground to the frame that's clean and secure. I suspect that both led sets within the light or connecting through the light itself through the running light input. They're from a reputable source as far as I know. (Superbrightled.com).

 

I also just tested the lights using 2 seperate batteries seperate of the truck to each Run and Turn function and they indeed work. I get Brake/turn function with input to run. Now I'm more confused than ever haha.

 

See if it works like it should with one light disconnected ?

Turn signal and tail light ??

Might need a diode in the tail light circuit to prevent back feed

 

It doesn't matter if there's one or both lights wired. Still the same issue.

When wired to the truck harness I obtain Run function I can take an external battery and simulate Brake/Turn function. Nice and bright! I wire the Turn wire from the truck I get no change or function. Using the test light I confirmed function at the Turn Wire but the light isn't registering it. Oddly enough the Left turn wire is output on the frame is nice and bright through the test light but weaker on the Right.

Do you think I have hyper flash and not noticing the Brake/Turn action at the taillight? Maybe a resistor would do the trick?

 

Using a test light that might be the case .

I have not used one of those for years.

 

now I'm confused. you said the brightness is the same when the "run" is on so you cannot see the "turn/stop"

but then you said you can clearly see the turn/stop function, but using power sources NOT from the truck?