Headlight Adjuster problem... any ideas!?

[4wheels]

i have a problem with the lights on my 2004 S4.
the dash tells me that the headlight adjustment is a bit faulty by showing the dipped headlight symbol on the display.

however!!
if you turn then lights on, and then start the car, i can see them hunt down and then up. so they appear to work.
ive even bought a new adjuster motor from audi, and tried it on both sides which didnt really make any difference.

any ideas? i guess a broken wire somewhere on the feedback loop??? or do i need to clear the fault after fitting new part?

 

[dualmono21]

had this on my car
do you have vcds or anyone local whom can scan the car for you

 

[S4_dan]

Did you do a vcds to diagnose the actual fault?

Most likely the levelling sensor has come adrift or is faulty. If you had fixed it, the light would extinguish from the dash but a DTC stored in the ecu.

 

[4wheels]

the previous owner had it scanned and said to replace the motor.... so did that.
i havent looked at the sensor yet, i guess thats the next place to look.

might have a look on ebay and see what you can buy to look at teh vag codes.

 

[dualmono21]

front sensor is just behind the wheel arch liner on passenger side
youll need vcds to check its altering position when moved

 

[4wheels]

i'd imagine, id i turned lights and ignition on, and moved it, it should move the light?

 

[S4_dan]

It will still move yes as that is part of the levelling system. But with a sensor being off level/broken, it will throw a fault and put the headlight into a default/fail safe position so not to dazzle other road users.

 

[4wheels]

ah yea, makes sense.
at least itll prove a broken wire or not i guess

 

[dualmono21]

plug it into vcds it will tell you the problem