Headlights keep blowing

Are the main/dip lights protected by a unique fuse? Not that that would shed any light on it. You would think that if the reg was not regging properly then there would be more bulbs/fuses blown. Could it be intermittently faulty earth?

[Quiff Wichard]

hope you get it sorted Si..

but I think this is the problem

pointing the lights skyward and them straining to get to the moon..










serious hope it sorts out

Its an aftermarket headlight right?

Could simply be vibration/poor design.

Or has been suggested by others, regulator and bare fingers on the glass are possibilities.

As no other bulbs are blowing, I'd go for vibration or fingers myself .. but I’d also be straight in there with a multimeter checking the running voltages

I'm still listening to suggestions.

To add a bit more info.

The problem started a long time after my twin headlights were installed. The problem has carried over with the new normal headlight I have installed. So this discounts vibrations. If it were vibrations, it would have done this a long time before with the old headlights. On top of this, I have used rubber washers to take out any serious vibrations.

Touching the bulbs. No. I know how to install them correctly. This is not the issue.

So far everyone who has suggested the regulator / rectifier are on the same train of thought as myself. I have not seen any other suggestion that would make me think of anything else. So at the moment I have to believe it is this. I shall check the the voltage tomorrow some time. If anyone else wants to suggest something I have not thought about, feel free to enlighten me.

Get a R6. HTH.

[Ruffy]

BigApe, Had any luck tracing the problem?

Are the lights brighter than normal (obviously, before they blow)? Sounds like too much voltage to me. Get out the multimeter and start checking outputs, wiring, yadda-yadda.

Originally Posted by Ruffy

BigApe, Had any luck tracing the problem?

Well he arrived at tonights meet with a functioning headlight. The real question is will he make it home?

Originally Posted by Ruffy

BigApe, Had any luck tracing the problem?

I think I now have it nailed down. The reg/rec is working fine. It's not that. The last time I put a new bulb in (just before arriving at the TVSF meet) the headlight wasn't working but the main-beam was. A prod of the connector block on the left hand side of the bike and the headlight came on. I gave it another wiggle and the headlight came on/off/on again. I believe corrosion has got into the block. I will cut the block out and solder all the wires on Sat.

I'm assuming the corrosion has led to shorting of wires.

Sod's law. Since diagnosing the suspected fault, the headlight remains lit. I shall do the by-pass surgery anyway.