Hello everyone

I am helping my buddy get his Special Force up and running. I have resolved some coil / transistor issues so far, but now i have run into a little issue.

I have no flashers on the following "Lines":

Bright lites 1
Bright lites 2
Bright lites 3
Bright lites 4

I know that bright lites 1-5 is on a shared transistor with some of the coils in the machine. And all of the coils that are shared with bright lites 1-4 works as they should. So i guess that eliminates transistor issues?

Bright lites 5 works as it should, along with its shared coil.

I have absolutely no experience with the 6803 system, and have a hard time reading the schematics. I would like to start by checking if the correct voltage is present at the flasher bulb, but i dont know which of the wires to check, as they are both "looped on" to the next flasher on that string (usually you know that the one that is "looped on"/ shared with other coils is the voltage side).

Any ideas where to start?

Thank you for the tips. If the flashers are indeed in series, that could explain it. But I just don't think the wiring on the actual flashers suggests that they are in series, but rather are in parallel?

But I will try checking all of the bulbs first, and then look into the resistors.

They are definitely in series. Don't know why I thought they were in parallel.

I investigated bright lights string number three by checking continuity. And there was indeed a blown flasher, and a bad connection in a socket. After fixing those issues, I had continuity all the way through, and a test revealed a working string

Now to investigate the remaining three strings. Thank you so much for your help @inkochnito!