Turn signals do not work after changing to LED lights?

MONTANA666

MEMBER
1993 FORD BRONCO
5.8L
V8
4WD
AUTOMATIC
98,000 MILES

I have no blinkers or flashers. I have LED in the front non led in back except for 3rd brake light. Brakes, taillights, running lights, park and all work including LED third light put LED flasher in, but my blinkers or flashers won't even come on not even on dash.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,913 POSTS

Yes, when you swap to LED the resistance goes down so the flasher will not engage. They make LEDs with the resistor interrogated into the bulb. Here are the blinker wiring diagrams so you can see how the system works. Also, they make a flasher that will work with the LED's. Check out the images (below). Please let us know what happens.

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Thursday, August 3rd, 2023 AT 11:55 AM

MONTANA666

MEMBER
4 POSTS

I bought a new flash relay it's been put in, but I still have no flat flashes and no blinkers. Do I just buy the resistor LEDs and put them in the back too?

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Thursday, August 3rd, 2023 AT 1:45 PM

KEN L

MASTER CERTIFIED MECHANIC
42,913 POSTS

Did the signals work before the bulb was changed? And if you install the stock bulbs does the system work? Please go over this guide, it could help:

https://www.2carpros.com/articles/turn-signals-not-working-blinker

Please go over this guide and get back to us.

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Friday, August 4th, 2023 AT 10:52 AM