348 headlight adjustment

There are adjustment arms attached to the sides of the headlight buckets. It's easiest to access them from underneath the front bumper.

 

+1

Likely not the adjustment arm. Something is stopping the light from fully opening.

 

The headlight motor has a plastic disc inside (rotating with the arm shaft) having copper tracks with gaps on it on which three copper wipers are riding. This device determines when to stop at bottom and top positions. A slightly worn (or corroded) track end at its gap may cause inaccurate stop. However, try with the arm adjustment first - it may not affect the bottom flap position when you adjust it for the correct top height as, I think, there are buffer stops for the flap at closed position which may allow some "free travel" of the rotating arm/shaft over its bottom dead centre and you may still have flush flap when closed.

 

Hi Marc, did you succeed? I got exact same trouble.
driver side is lower than passenger and if i use the arm to make it higher, then, when opened, it's too high...
Using the rubber stop to shorten the movement is useless because the motor clearly forces on it and it could damage it.
I spent hours and can't improve it.

 

If the beam is off just a little bit they're adjustment screws on the headlight itself to adjust the tilt. If the pop-up headlight unit itself is lower that would be something with the arm.

 

hello,
indeed i am speaking about the headlight box, not the 'light level'.
If i extend the arm, of course the box comes higher and at proper level when light are off. However, when lights are on then this same light box is then too high..

 

Hi everyone,
I have (also) a problem with the alignment of the pop-up headlights (headlights up). There is about 10mm of difference between the right and the left. It's the left that's too low. I first changed the setting of the “Bump stops” but still the same gap. When I manually turn the knob on the motor, the headlight lifts and reach the right position... But as soon as I turn electric back on and use the switch, I still have the same problem. I replaced the 3 relays and did several tests... always the same gap. Important point, when I turn the switch on, the right goes up directly while the left headlight goes down slightly and then goes up.
Does anyone have any idea before I disassemble the engine ?
Have a nice week'end !

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I believe you need to shorten the adjustment arm and then rotate slightly the lever on the motor.
Or you need a new motor because 1motor is rotating different than the other

 

This video may help:



I'm trying to understand the function of the bump stops. The motor stops when the electrics tell it to stop. The motor only travels in one direction, so why would you need endstops? Are the bump stops just there in case something breaks i.e. they shouldn't normally be in contact with anything?

Because the light reaches the correct limits when manually rotating the knob, if there was an electrical cause for this, perhaps one of the internal contact fingers has worn away (and is shorter than it should be) and the motor is stopping too late or too soon.

 

Thanks for replying.
What I noticed is the the covered distance (length) is ok and the looks to change directory. It seems to be out of step with the other.
I'll (when time) have a look on attachment point (screw) and see if setting is adjustable...

 

Thanks Qavion,
Interresting video that will help me.
I also wonder the function of the bump stops... if there is....
Will get some news when processing next step.

 

The bump stops definately limit the movement when screwed out too far.
On my project 355 I had the lights out and dismantled, and when put together again the bumps were touching too early because I had not screwed them in far enough.
But as you mention the light first goes down before it goes up, your "problem" might be in the connecting arm.
Length is ok, but you might need to change the position of the arm on the motor : screw it loose a bit ( 10 mm nut I think) , set it back like "5 minutes" and try again.

 

I guess if the bump stops provided a light resistance, that may help stop vibration and wear on components... but if too much pressure, it would stop normal movement and possibly put strain on the motor gearbox's soft plastic gears.

 

I think they are there for any coasting

 

the 'stops' do not limit the movement or maybe just less than a millimeter. Because if they touch before the motor reach his position, the motor will force (you will see it immediately)... I have similare issue but never found the solution.

 

Or take it apart and fix it so it works like a new motor

 

Hello, I have similar issue like Bonnefond. Maybe someone experienced the same problem. My headlights are flush when closed, but when they are opening, they both go up but then the right goes 1cm back and stay sitting little bit lower. What is the correct way to adjust? Knob on the engine or lever rotation?

 

Basically, is there a way to adjust headlights when theye are on? (open) Thank you

 

Mine was doing the same thing on the right side coming up and then dropping down a little bit, I replaced all three relays related to the headlight lifting operation, cured the problem.
Alden

 

I think the mechanical linkage only affects how high the pod goes. Since yours is going to the same height as the other, then back down again (by a small amount), there may be something electrical allowing the pod to overshoot. The motor relays only control power to the motor. The 3rd relay will have control of that motor.

If the control relay doesn't work, you may have to open up the motor gearbox and check for things like corrosion, broken contact fingers, dried grease, broken cogs, etc. The diodes may have to be checked, too.