Converting 2-wire to 3 wire Signals

[buzz1560]

Its a 20 watt 8 ohm resistor. I'm going to relocate the resisitors due to their weight pulling on the flushmount harness. Probably mount them up on the frame somewhere.

[gpc0722]

Thanks for the info. this is exactly what I needed
did you hook the load resistor to the black wire and
the other end to where the yellow wire connects
to the other two, in between the diode

[buzz1560]

Yep that's how I wired it up.

[gpc0722]

Perfect... Thanks very much for the help...
Cheers

[kingnba6]

Thanks for the awesome how-to.

[jp2code]

OK, so let's get back onto the subject for a moment.

I want to wire up some diodes on my 2009 Harley Sportster.

Originally, I simply planned to do the relay option, until coming across this post, so big thanks to OP.

That said, I created a little breadboard with an LED, a resistor, and a diode. Connected it, and verified it worked.

I had to make big changes in the wiring diagram, because the Sportster is not quite the same as the R6 (who'd of thought? Anyway...).

The Sportster comes with Filament Bulbs, and LEDs draw much less current. When replacing filament bulbs with LEDs, load resistors have to be included or the Turn Signal Module (TSM) will detect that not enough current was used, and throw a code (i.e. Check Engine light).

I want to keep it that way, meaning I don't really want a Check Engine light; however, if I keep the load resistors in place (as shown in the attachment), they will be burning heat all of the time. I don't want that either.

How could I estimate how much current this circuit uses without the Load Resistors (in red)? Will the diodes use anything noticeable?

The LEDs I have are Rizoma Zero-11, which are rated at 13W.



Basically, I'm looking to answer a couple of questions:

1. Is there a way to calculate if I'll need the load resistors or not?
2. Where would load resistors need to be moved to if left on so that the circuit continues to work as it should?

Thanks,
~Joe

[jp2code]

So, I got this to work on my 2009 Harley-Davidson Sportster XR1200:

You Tube video demo:

You Tube

You Tube

Here is the wiring diagram I ended up going with:



My situation turned out to be a little more involved than the simple schematic the OP showed.