My brother just replaced his tail light/ blinker on his dodge durango and now it blinks really fast. Like a short or perhaps a bad fuse?

 

Isn't that a relay? nORMALLY YOU CAN HEAR THE RELAY GOING LIKE THE CLAPPERS IN THE CAR...

 

He obviously got a bulb with bad air in it. Take it back and have them change the air in the bulb

 

if the current running through the system is off from factory specs the lights will blink faster like that...maybe he's got the wrong bulb in there?

 

Isn't that what I said? Sheeessh...

 

yea, i just thought the way you worded it was a little confusing

 

i dont know about wrong bulb, i didnt see what he put in. My dad had it in his BMW but i dont remember the cause. Hmm, how hard is it to change a relay?

 

On most cars, the indicator system is designed to blink fast like that when ever the bulb burns out as a way to let you know that a bulb needs to be changed. Try it in your car, go pull a front or rear indicator, and then activate that side. It will blink fast.

90% odds that it's the wrong bulb or another burnt out one. I don't know if a short would cause that reaction, because a short would indicate to the car that there is a circuit, plus it would probably fry the fuse immediately. Tell him to go back and double check the PN and functionality of both front and rear indicators. If everything is hunky dorey, let me know, and I'll unleash my intellect.

 

so i just got it a new bulb and it does the smae thing. All lights are still blinking fast (on drivers side). Th eguy at autozone said a bad bulb too and got us a new one (for free). Is it possible its teh connector it plugs into that is bad? Supposdly the bad bulb will cause less resistence and therefore all the lights will receive more voltage causing them to blink faster.

He also said if it was a short the blinkers wouldnt go on because it would wreck the circuit and a relay would just cause it to stay on.

 

maybe try pulling teh bulb back out and cleaning teh socket. Or, bperhaps another bulb on teh same circuit is going bad?