Headlight not working anymore

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MechanIX

MechanIX

Member
Posts
42
Location
Nice
Hi everybody,

I had intermittent failures with the headlight during summer, scared me the first time it happened while driving in the mountains and plain dark. But hopefully full beam has always been working, playing with the light switch usually proved something was wrong as I was also loosing the dashboard, eventually the whole lot died and I couldn't get the headlights stable anymore. I've replaced that switch with a Lucas, but never got back the headlights back.
I've replaced today the indicator/full beam/switch with another Lucas but it didn't help either.
I've checked the lights relay, it clicks when putting the ignition to ready (before engaging the engine).

Not sure where I should be checking for now...

I've checked the bulbs obviously, but they're good.

Please shed some light 💡

All the best
 
MechanIX said:
Hi everybody,

I had intermittent failures with the headlight during summer, scared me the first time it happened while driving in the mountains and plain dark. But hopefully full beam has always been working, playing with the light switch usually proved something was wrong as I was also loosing the dashboard, eventually the whole lot died and I couldn't get the headlights stable anymore. I've replaced that switch with a Lucas, but never got back the headlights back.
I've replaced today the indicator/full beam/switch with another Lucas but it didn't help either.
I've checked the lights relay, it clicks when putting the ignition to ready (before engaging the engine).

Not sure where I should be checking for now...

I've checked the bulbs obviously, but they're good.

Please shed some light 💡

All the best
Click to expand...

Check earths, headlight assembly earths, dash earths and steering column earths ...


What vehicle is it, as this section is for TD5 Engines ?
 
Hi, check earth header C0550, fiddle with it while the lamps are switched on to see if it has any effect or not

1699256056145.png
 
After much fiddling, electrical tests, earth points checking, cleaning and all. It ended up being the light relay clicking but not doing its job.

I also found out how much custom made electrical has been made (stationary heater, inverter, towing pulley, top light beams, rear light beam and much more ...).

Thank you so much for your guidance, it did help.
 
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