I have a 2010 f150, I put anzo LED tail lights in.
After a couple of months the drivers side started blinking fast when I
hit the brakes with the turning singal on.
Any ideas on what it could be?

 

Ya.....the truck thinks the bulb is out cause the leds are drawing less than a normal bulb....

I think something could've happened to the built in load resistor in the tail light itself....

 

Yes. Anzos are in the category of "eBay rice". They use a crappy current-resisting system instead of doing it properly. The load resistors get very hot and fail often.

The fix would be open it up, and replace the load resistors, OR buy new ones OR build your own for a fraction of the cost (if you are electrically inclined).

 

So When I sent them back to the place I bought them, he should
have figured it out? It's only the one side. But my stock lights work
fine.

 

Your stock lights don't need the load resistors the led ones do....

Something is wrong with the actual anzo light itself inside of it.....with the electronics....

So the guy you sent them back to doesn't know what they're doing.....

 

Im not sure if those would have load balancers built in or not ( resistors).

http://www.v-leds.com/blinker-warnin...ng-plates.html

www.v-leds.com has some either 2 or 4 bulb. i would think putting them in the front would leave the most room for mounting options. as these get HOT HOT HOT.

I left it as is. they do blink faster , however not fast enough for me to worry about it.

my fronts are switch back LEDs where they are white - parking. and flash orange when signal is on.
i also have diodes installed front and back on all turn/park so there is no feedback.

have a good week.

 

I think the op got the whole taillight housing from anzo

 

I'd guess the front turn signal bulb burned out.

 

My guess too.

 

Highly improbably. OP states:

If the problem only happens when he hits the brakes, its obviously a load equalizer problem from the rear tail lights. Of course he should have checked the front bulbs beforehand anyways.

 

In post 4 he stated that his stock lights work fine. I'd say his front bulbs were perfect.