I just got the bike and I purchased a Haynes Manual but otherwise I don’t know much about it.No, but interesting. Need some more information. What's your battery voltage when that is happening, key off then key on? Is there any clicking sound under the seat or fairing that sounds like a relay click? Those lights seem rhythmic so relay. Flasher and signal light switches off? There isn't a headlight modulator in that bike is there, or other aftermarket add ons? If a headlight modulator one could think a bad ground and is grounding back through the headlight circuit.
To me that is a flag there and perhaps a modulator installed or a bad ground or a faulty low/high switch. LED or incandescent bulbs? I would see if you can see aftermarket wiring to the headlights and perhaps a little box up behind the headlights to see if there is something on that circuit. For starters I would think you should be able to see something from the top without pulling to much tupperware off. Also if you just got the bike, It would be a good time to pull plastic, go through it with fluid changes etc. That is another topic in itself. Welcome to the forum!Sometimes when I switch the headlights from low to high beam the headlight flashes for a while and then stops. I don’t know why it does that.
Thank you, this sounds right. The bike would not start this morning and the display was dull, I switched the headlight switch back and forth a few times and the display lit up and the bike started.There's a yellow grounding block in the front fairing (harness attached to the windscreen frame, quite easy to get to by removing the dash and plastic under the screen - unclip the mirror housings, then there are 8(?) screws, and the rest are clips. Raise the screen fully and you should be able to get it all apart without removing the screen)
If the grounding block has issues, this can prevent the bike from starting (it can backfeed 12V into ground for various components such as the kill switch, tipover sensor, etc etc). That, combined with a headlight modulator could cause the flashing dash perhaps.
My ground block looked fine, but removing the cap (with some difficulty admittedly) revealed a burnt connection. Holding the cap while the bike was switched on, and it quickly got quite warm! Wiggling it switched various lights and the fuel pump on and off
Cutting the block off, crimping ring terminals to each wire (14off) and a bolt is a decent 'fix', which could be further improved with an additional larger gauge wire providing another grounding point to nearby framework.
Yes, there could also be a bad modulator on there, guess I will find out when I take it apart.To me that is a flag there and perhaps a modulator installed or a bad ground or a faulty low/high switch. LED or incandescent bulbs? I would see if you can see aftermarket wiring to the headlights and perhaps a little box up behind the headlights to see if there is something on that circuit. For starters I would think you should be able to see something from the top without pulling to much tupperware off. Also if you just got the bike, It would be a good time to pull plastic, go through it with fluid changes etc. That is another topic in itself. Welcome to the forum!
I was also thinking that.Worth doing, even if only to give you a chance to give it a decent once-over
But you can get the dash off on it's own quite easily (although harder to get tools in there without taking the headlight out too)
Still looking for the ground…I used PIAA lights years ago.
While we wait for the electronical geniuses (or genii?) to appear, the multi-pin white connector looks more dirty, than burned. But you are certainly getting closer to the root cause, in my amateurish opinion.
From what I have read here, the Honda factory Ground is usually a green or green / brown wire throughout the ST.Still looking for the ground…
Run down the ground connections at the yellow buss above the RJ headlight already mentioned and check the condition of the inside of that white 24 pin connector in your picture. Weird or strange electrical issues of all types in the front half of the bike very often have in common a bad ground in these two connections. Solid green wires are ground conductors.