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Old 05-18-2021, 10:00 AM   #21
Pilotdave
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Default Re: LED Tail Lights - Adding Resistors

Synchro909, the turn signals are combined with the brake light in the tail light units.

Patrick, the front directional lights use incandescent bulbs. There are no indications of the candle power or wattage on them, however, and thus far I haven't been able to locate a source for higher power bulbs.

The reason the resistor is connected in parallel is that doing so lowers the resistance in the directional circuit. Less resistance translates into higher current flow which is what the flasher unit needs to slow down the flash rate.

I have now run a wire from the battery ground point to provide a ground point at the tail lights so don't need to be concerned about a faulty ground for them or the resistor. Still getting the same fast flash rate. This implies that the load resistor has too high a R value - I think!

Some ideas:
1. find a load resistor with a smaller R value - or perhaps double up the load resistors to effectively create a lower R value.
2. Find an electronic flasher that actually works with 6v, +ground systems.

Other ideas would be really welcome!

Dave
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Old 05-18-2021, 10:12 AM   #22
Bob Johnson
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Default Re: LED Tail Lights - Adding Resistors

Quote:
Originally Posted by nkaminar View Post
Bob, the resistors are meant to cure hyperflashing. I know it does not sound logical but that is what they are for. See https://www.superbrightleds.com/blog...rflashing/275/.



My bad ignore my previous post


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Old 05-18-2021, 10:52 AM   #23
nkaminar
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Default Re: LED Tail Lights - Adding Resistors

Pilot Dave, I think you are on the right track. Remember to check the pinouts on any LED flasher you get.
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Old 05-18-2021, 10:55 AM   #24
Pilotdave
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Default Re: LED Tail Lights - Adding Resistors

An update. I switched out the (thermal) flasher unit to a different brand I had on hand. The flash rate is now quite acceptable. Interestingly, the flash rate is identical on both left (includes resistor) and right (no resistor). I conclude that, somehow, the added resistor is not making proper contact on one lead or the other.

Thanks for all your suggestions......sometimes I guess it pays to try the simplest thing, even if it's illogical! Apparently it's too much to expect that 535 flashers are all the same!

One more test to try: I'll pull the incandescent bulb in the front flasher to see if its absence makes any difference.
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Old 05-18-2021, 07:24 PM   #25
Patrick L.
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Default Re: LED Tail Lights - Adding Resistors

There is a lot of info on certain website regarding bulb candle power. One is bulbtown.com.


Not all flashers are created equal. Its best to find a NOS somewhere. The new chinese units are junk.
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