Warning Light Woes

[RichieB]

Hi All,

new here.

I'm in the UK but my 10,000 mile '78 XS650SE started life in the U.S and as such has the brake/tail check light and runs with lights on all the time. My problem is that at 4000rpm the brake/tail warning light begins to dimly illuminate and then gets brighter as the revs rise until it's fully lit at 4500rpm and above. Drop below 4k, light dims out. Swapped out the brake/tail bulb and checked wiring integrity and all appears good. I know it's not the biggest problem I could have but it's bugging me so if anyone had any ideas about how to rectify (no pun intended) the issue I'd be keen (and thankful) to hear them.

Cheers, RB.

 

[Wingedwheel]

Im not sure about how that particular bike is set up but would a bad relay cause that?

 

[RichieB]

Thank you for your suggestion, Wingedwheel. I will investigate that theory, much obliged to you.

 

[Casull]

Could be 1. the stator on the way out, 2. safety relay ( which is energised by the yellow wire from the stator), 3. the light checker relay. or a bad connection on any of these. but my guess would be to check the voltage coming out the yellow wire from the stator first

 

[RichieB]

Thanks Casull, much appreciated. Time to dig out the multi-meter again and do a work-through.