When I push/activate the emergency flasher switch on the dashboard (center), nothing happens except that I notice a buzzing noise on the left side of the dash somewhere behind the hand/parking brake.

Any clues what's fault?

Thanks!

__________________
2011 Prius

I'm not sure what car you are working with, but a lot of these problems are a result of bad solder joints.

I had a problem where I had no buzzing at all, pulling out the buzzer relay and resoldering all the joints fixed it right up. I'm guessing this is similar, but I can't be sure.

xp

__________________
1985 190E 2.3L - a constant project.

Thanks. Tried it again this morning, and guess what: yep, works fine again.. Just moisture, I think.

__________________
2011 Prius

Try pulling the relay and cleaning the contacts , or you will probably have the problem return soon.Good luck.

__________________
Democracy dies in darkness, you have to kick at the darkness till it bleeds daylight

My manual says that I need to pull out the combi instrument (speedo/rpm/etc) to reach this relay. Is that correct? Seems risky to break something...

__________________
2011 Prius

The hardest part about pulling the instument cluster is disconnecting the speedo cable at the tranny. This gives you enough slack to get it out far enough to undo the speedo connection . There is also a ground behind the cluster that you should check and clean while you're at it.

__________________
Democracy dies in darkness, you have to kick at the darkness till it bleeds daylight