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 Faulty bulb 
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2CV Fan

Joined: December 27th, 2011, 9:50 pm
Posts: 99
Post Faulty bulb
Hi all.
Opinions please.
For several days I have been driving after dark with headlights on.
I quickly noticed the off-side dipped beam was intermittent, flashing on and off.
Faulty bulb, fair enough, but as the bulb flashed the engine sometimes hesitated momentarily.
I replaced the bulb which cure the engine faltering.
Had the filament end reflector plate rattling around freely inside caused a dead short within the bulb?
My 2cv does not suffer from cutting out so can I assume my diagnosis is correct.
If so, is it a good idea to fit a battery fuse?

Comments please.

September 24th, 2022, 2:28 pm
Firing on two.
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Joined: August 8th, 2012, 11:00 am
Posts: 457
Location: Korpilahti, Finland
Post Re: Faulty bulb
Why not put fuse for all filaments, like is on "north spec" 2CV's and Dyane's? Two fuse boxes instead of one, four of them for headlights, two separate for side lights and one for switched and another for continious supply..?

Quite rare to have shorted bulb inside, never heard of that...

September 24th, 2022, 7:03 pm
Firing on two.
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Joined: March 21st, 2013, 12:04 am
Posts: 1454
Location: Exeter, Devon
Post Re: Faulty bulb
I would be checking the headlight/side light grounds.
If you have electronic ignition, check the ground for that as well. :)

Actually .... check all the grounds :D

If you can't fix it with a hammer, it's probably electrical (or, an electric fuel pump!) ....

September 24th, 2022, 8:03 pm
Firing on two.
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Joined: March 5th, 2009, 6:23 pm
Posts: 2089
Location: Near Monmouth
Post Re: Faulty bulb
May be as the bulb reconnects the current surge is enough to put a load on the alternator?

September 27th, 2022, 4:29 pm
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