New LED turn signals not flashing while headlights are on

[WesFischer05]

As the title says I just put new LED's in my 1981 El Camino and I have also installed the new LED flashers so they blink at a normal speed with the headlights off but as soon as I turn the the headlights on the do not flash and are just solid. I have researched a little but can't find any smoking gun problem solves but before I stress too much about it I wanted to ask you guys to see if maybe anyone knows something I missed or a place to start, thank you!

 

[SoFloG]

Check your grounds up front

 

[78Delta88]

Was everything stock and just put in led bulbs or did you change the sockets?

 

[WesFischer05]

Was everything stock and just put in led bulbs or did you change the sockets?

Stock sockets, just new bulbs and flashers.

 

[CopperNick]

Had that happen when I went to LED bulbs on my non G-Body Gee10. Found that with the lignts on and ignition off, no blinkee. Turn the engine on, and Voila! winkin' and blinkin' work like normal. I thought at the time it was the flasher module but it made no sense to me that a simple bulb change would scramble the module like that.

You might want to check me on this but I seem to recall that the LED's have a different resistance value, lower/higher/? It did get mentioned that I might have to add a resistor into the turn signal circuit to make the bulbs play nice like they ought to. As they do work for me for what I need, adding that resistor never happened so moot but a possibility for you to consider.



Nick

 

[WesFischer05]

Had that happen when I went to LED bulbs on my non G-Body Gee10. Found that with the lignts on and ignition off, no blinkee. Turn the engine on, and Voila! winkin' and blinkin' work like normal. I thought at the time it was the flasher module but it made no sense to me that a simple bulb change would scramble the module like that.

You might want to check me on this but I seem to recall that the LED's have a different resistance value, lower/higher/? It did get mentioned that I might have to add a resistor into the turn signal circuit to make the bulbs play nice like they ought to. As they do work for me for what I need, adding that resistor never happened so moot but a possibility for you to consider.



Nick

Awesome thank you for the reply, same situation as you with the resistors but currently I’m swapping the engine so it doesn’t run but it will soon! So that will be my next check once I can make it run and see if it works while running

 

[78Delta88]

We're stock bulbs 1157 dual filament or 1156 single filament?

Some how you are getting positive voltage across the led when the headlights come on so do the parking/running lights. If this is a paired socket it's bleeding over to the other side of the led that should be electrically isolated.

 

[abbey castro]

I put leds in the instrument panel and my turn signals indicator stayed on and would flash normally. Took out the leds, all's fine!

 

[78Delta88]

So, everything all good now?

 

[WesFischer05]

We're stock bulbs 1157 dual filament or 1156 single filament?

Some how you are getting positive voltage across the led when the headlights come on so do the parking/running lights. If this is a paired socket it's bleeding over to the other side of the led that should be electrically isolated.

I believe dual filament, before the leds when the headlights would turn on the parking lights were also on, all at once. Then of course they would blink when I put the signals on