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Another LED Light Bulb Question

Bulbs grow in the garden.

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Yes, you will need to attach the ground wire, at least I needed to on my Charger.
I’m currently powering up my dash after a resto and Led bulb install this week.
Interesting issue I had which might help someone. Emergency flashers worked great. I used red LED’s for the tail lights.
But turn signals did not work. Since I installed a new turn signal switch that’s where I did my troubleshooting. Spent quite a bit of time looking over the pin out on the TS plug.
Issue was polarity ! The E flashers are on a separate circuit using dual filament tail light bulbs.
I changed the polarity on the turn signal flasher and all worked correctly.
So E flasher and TS had different polarity on each flasher module.
I bought the flashers(2) that are in the pic. You just change the cap to change polarity.

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Yes, you will need to attach the ground wire, at least I needed to on my Charger.
I’m currently powering up my dash after a resto and Led bulb install this week.
Interesting issue I had which might help someone. Emergency flashers worked great. I used red LED’s for the tail lights.
But turn signals did not work. Since I installed a new turn signal switch that’s where I did my troubleshooting. Spent quite a bit of time looking over the pin out on the TS plug.
Issue was polarity ! The E flashers are on a separate circuit using dual filament tail light bulbs.
I changed the polarity on the turn signal flasher and all worked correctly.
So E flasher and TS had different polarity on each flasher module.
I bought the flashers(2) that are in the pic. You just change the cap to change polarity.

View attachment 1819304
Thanks. The shop put in the LED flasher at the brake pedal for the 4 ways, but missed the turn signal flasher at the ashtray, so the stock flasher was left there. They installed LEDs-all the way around except the front turn signal, because when they put those in they didn’t flash. With incandescent bulbs in the front turn signals and LEDs everywhere else everything works. I’m hoping installing the second LED flasher fixes the problem and I can run LED bulbs in the front turn signals.
 
Thanks. The shop put in the LED flasher at the brake pedal for the 4 ways, but missed the turn signal flasher at the ashtray, so the stock flasher was left there. They installed LEDs-all the way around except the front turn signal, because when they put those in they didn’t flash. With incandescent bulbs in the front turn signals and LEDs everywhere else everything works. I’m hoping installing the second LED flasher fixes the problem and I can run LED bulbs in the front turn signals.
Just keep in mind that the second flasher will need a ground and possibly polarity changed.
 
How do you change the polarity? Switch the wires at the flasher terminal block?
Yes, but probably your wire plug won’t allow you to do that due to the shape of the plug.
That’s why the flasher I included in the picture of my post allows you to put the cap on the flasher to change polarity.
The cap has internal wiring.
Research that flasher and find a picture of the underside of the cap.
 
I would assume if it has a ground wire, it needs to be grounded for it work correctly. If its too late to return it and get what you ordered, I’d use the ground wire version for the four-ways, fairly easy to get at (ground) compared to the turn signal flasher.
 
Thanks, would I need to reverse polarity on just one with the ground or both?
Original wires to turn signals would get reversed. Then test to see if they flasher. In my car the emergency flashers was fine in normal configuration. I had to reverse my TS flasher using that cap.
 
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