Weird fast blinker issue

[SixPointTwo]

Okay, ive dealt with a fast blinker many times but this is weird to me. My right blinker is fine, my left one blinks twice as fast, and when the headlights are on, its about 4 times faster than it should be. Why would turning the headlights on change this???

I should also mention I have LED tail lights as well.

 

[Purefection]

Do you have a resistor in with your tail lights? LEDs provide significantly less resistance and it will make the truck think that the bulb is Burnt out. Headlights on would mean your tails are on constantly too, which to me makes sense if it's blinking faster.

 

[someotherguy]

If he means actual full-replacement LED taillights, most have the resistor built-in. If it's LED replacement bulbs in the original style sockets, then one of the circuit boards is probably bad or there's a ground problem elsewhere. Or the simple problem, a bulb elsewhere in the circuit is out.

Hack the flasher or replace it with an LED-specific unit to kill hyperflash with LED's is the quick answer, but I suspect you'll still be chasing a bulb out or a ground problem.

Richard

 

[SixPointTwo]

If he means actual full-replacement LED taillights, most have the resistor built-in. If it's LED replacement bulbs in the original style sockets, then one of the circuit boards is probably bad or there's a ground problem elsewhere. Or the simple problem, a bulb elsewhere in the circuit is out.

Hack the flasher or replace it with an LED-specific unit to kill hyperflash with LED's is the quick answer, but I suspect you'll still be chasing a bulb out or a ground problem.

Richard

Nope I think it's a ground like you said because they're full replacement sets:

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[Purefection]

Definitely a grounding issue then or the resistor is gone in the one light assembly.

 

[93SierraZ71]

I had the exact same problem and it turned out to be a bad ground wire connection, but I had a fast signal, and no tail/brake lights at all. Check the ground wire off the harness for tail lights under the rear bumper, it bolts to the frame at the back drivers side if I remember correctly. Could also be a bad resistor, I don't have LED tail lamps