Hi all
This my X-Type 2.5 V6:























I have a problem with the electrical adjustment of the right light: the motor remains motionless!
Already tested: the light works

Advice?

 

gim2006Italy, based on your pics, it would appear that the internals of your right headlight have broken and this is causing the internals to move about, resulting in your inability to alter the headlight aim. This is a common issue with the X-TYpe. The plastic dries out and becomes brittle. A good pothole and the whole headlight starts flopping about. Based on the pictures, your right headlight is aimed for the sky. If you look around, there are repair kits for sale that will correct this. Now, you need to pull the headlight from the car and put it in your oven to soften the glue (never exceed 250F, 120C or the headlight will deform). If you look here, there are lots of write ups on how to do it. Not necessarily hard, but it will take you a few hours to do.

 

Hi, thanks for the reply
The headlights have already been replaced by new regenerated ones: I assume it is an optical defect in the photo

The headlights have been adjusted by the electrician and light up correctly only that the electric height adjustment does not work, as the signal ONLY to the right headlight did not arrive

 

Does your car have driver adjusted headlamp levelling (four position rotary switch on your headlight switch assembly), or is your car fitted with the auto headlight levelling feature?

If you have the driver controlled levelling switch, then the blue wire going to each headlight assembly (pin 2) is the one that carries the servo control stepped voltage.....compare left and right to see if same voltage gettoing to both headlight assemblies.
If one blue wire is not delivering the voltage then you have a wire break in loom as they are to both deliver the same signal voltage from the headlight tilt switch.
I assume both dip lights are working, if only one is working you need to be checking fuses F29 and F30 in your power distribution fuse box.

 

Exactly: I have the adjustment wheel.

So it could simply be the fuse?

The car light comes on regularly.

 

Each headlight assembly has its own servo.
The servo driver module is only powered up when the DIP lights are switched on, hence me asking if both DIP lights are working (if one is not illuminating then you are looking at Fuse 29 or 30 to solve that).
If both DIP lights glow, then you need to check that the blue wire to each is delivering the headlamp leveling command voltage to the headlight assembly (that voltage has 4 steps so the voltage on that wire depends on the position the level selector switch is currently on, so compare each side to make sure the same voltage is being delivered).

If that stepped voltage is correct to both headlight assemblies, then it would appear the fault is inside the headlamp assembly and either is:-

1. A mechanical issue as Thermo described, or
2. Failed internal connection wire supplying the DIP light 12 volts or earth internally to the servo module, or
3. Faulty servo motor, or
4. Failed servo drive module.

Good luck with your hunting down of this fault.

 

where is the module located?

 

The servo amplifier is located within each headlight assembly and receives its instruction via the blue wire.
It only has power applied to it when the DIP lights are lit.
Its output wires go directly to the servo motor within the headlight assembly.

So that is why I wanted to double check you have both DIP lights able to light up.
Then check the voltage on the blue wire to each headlight to make sure the voltage is the same to each. That voltage will change as you switch the tilt level switch control to different positions.
If the lights are both turning on and you have the correct voltage on the blue wires to both the good and the troublesome light assembly, then you have a problem within the light assembly itself.......broken mechanism, cooked wiring within headlight assembly, bad servo motor or bad servo amplifier.
Eliminate the external factors first before diving into the headlight assembly.

 

I'm sure it's not the light assembly: I've replaced both lights with remanufactured car lights and I've also tried connecting the left light (which works perfectly) to the right connector: the adjustment doesn't work!

I need to investigate the wiring

Sorry, what is the "DIP"?

 

Dip is the term in your manual for low beam mode of your headlights.
As you turn the headlight switch on you are first activating park lights, then Dip lights then Autolights (if you have that feature).
Pull that switch out to access front and front/rear fogs.
Stalk triggers main beam (high beam, Dazzle depending on your terminology)

 

Everything works except the height adjustment of the right headlight

 

OK, sounds like you have narrowed it down.
So you just need to check that the blue wire to that right light assembly has the same tilt control voltage on it as the left working light assembly....sounds like you have a damaged blue wire to that side.

 

See: