Hi Guys 
My K100RS 1986 has an electrical problem that i could do with a bit of help please !
horn doesn't work & when you press indicator switch all indicators come on but go off as soon as you let go of switch 
It was all working fine a couple of weeks ago 
took for a RWC & this is when i found out about this problem 
does any one have a pic of the fuse box cover ? mine has disappeared 
many thanks !

Hey good man !

Removing fuse 7 (the bottom one) reproduces your symptoms, check it out.

I have this same problem on my '96 K1100RS. What I found is that when the Hazard light switch is on, the indicators won't stay on, ie they cancel when you take your finger of the switch. This means that something in the hazard light circuit is shorting out the indicators.
Sorry, I can't help you past that because I've not bothered to find the fault. With the hazard light switch off it's not a problem.
Not sure if hazard lights are required for rego here in AU but the old girl passes each year.
Cheers Nigel

I spose your horn still works though, especially since it keeps passing the roadworthy.

Maybe the flasher unit is damaged.

thomo wrote:Hi Guys 
My K100RS 1986 has an electrical problem that i could do with a bit of help please !
horn doesn't work & when you press indicator switch all indicators come on but go off as soon as you let go of switch 
It was all working fine a couple of weeks ago 
took for a RWC & this is when i found out about this problem 
does any one have a pic of the fuse box cover ? mine has disappeared 
many thanks !

so after investigating the problem 
the horns shorted the fuse ! put 2 x new horns & replaced fuse this has solved the issue 
thanks for your help !

If the horns haven't been used in years, they might be jammed shut with rust, pressing the horn button like that a few times too many, might cause the fuse to blow.

One of my bricks (that sat for ten years) had jammed horns, I gave them some taps and shakes and wiggles and got them going again. You might be able to fix them and keep them for spares.

Well, that's a hornblower......

I don't know whether to laugh, cry or just shake my head in disbelief at that pun.