I recently purchased some led lights to replace my tails and back up lights and got them installed today. They're a lot more bright and focused than the incandescent ones that were in there. The problem is that when the turning signal is used, its super fast now. I know that its because its a more efficient bulb, but what I don't understand is why the left blinks faster than the right. I've done the blinker mod, and thinking that it was the cause, I clipped the wires and one was still faster than the other. If I put the incandescents back in, they both go the same speed though. And swapping the led bulbs didn't matter. Does anybody know why one is blinking substancially faster than the other? Honestly, it doesn't seem like it will cause damage and nobody but me will even really notice it, so I can live with it, but I just want to understand why its doing this.

 

you need a relay designed for led lights

 

Even if the only thing led is the tails? Leaving everything alone won't hurt anything, will it?

 

led lights are a much lighter load on the circuit. the new relay is designed to bleed off some of the excess current through a ground wire to slow down the flashing lights.
example, i am a mechanic at a Peterbilt dealership here in ontario, a lot of drivers will switch out their tail lights for led once they go bad and the front corner lights because they last longer and are a lot cheaper than the factory lights. we always have to install led relays to correct the fast flashing issues

 

Dont know about Ford but with my Honda if one side blinked faster than the other it was because another bulb in the circuit was out you may want to check you front light on the side that binks fast

 

But leaving it alone won't hurt anything, right?

I have checked all the lights and all are working. I don't mind the fast blink, it just makes it grab your attention better.