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Not sure if this is relevant. My full and low beams blew. Identified yellow micro 20amp fuse for 'lights' kept blowing in engine fuse box everytime it was replaced. Replaced larger low and high beam blue lamp fuses and swapped them around with horn and fog blue fuses. The 20amp fuse held and has solved problems for now.
As to whether globes are blowing in sympathy at various times, I don't believe they weaken as a result of others blowing. The underlying problem would still be transients due to either poor earthing, poorly regulated voltage supply or both. As for upping the rating of your fuses, yes, that will stop them blowing and it may even be a reasonable fix if the system is drawing a little more current than usual, but there will come a point when the current permitted to flow through the fuse will blow something more expensive instead. Fuses are there for protection, and the designer has chosen the values to provide a given margin.
Thanks a lot !!Is it a plausible explanation that a blown bulb could cause others sharing the same earth to also blow out since there are fewer bulbs "absorbing" a surge? ?
I changed the bulb for now. The cabin light turned out to be just a loose connection. I had 2.5 bar on all 4 a few months back and the ride was pretty hard. Maybe all that shaking caused some bulb issues... dont know.Down to 2.4 now, will wait a bit before looking deeper into electrical faults
Over my years it's been often the case if 1 side blew the other was not far behind. Just recently I've had 2 i30s of mine blow the same headlight a week apart.
Have you check the charge with a multimeter 13.6 or 14 V . and check also on 2000 or 3000 RPM maybe the regulator is damaged .