Auto Headlight problem

**LandyAndy** · 5th May 2015, 10:16 PM

It seems Lord Lucas could be haunting Snow White.
Left here at 5.30am to take Deb up to the city for doctors appointments.Half way up to the city the auto Headlights went out

Could only get them to switch on manually,even after a re-start.Later on when light I switched back to auto,still no headlights.Got to the hospital drive into the multi-storey carpark and they were working again,much lighter than when they failed.They were when we left too.
Went to another appointment,got back to the car at 5pm.Parked in the open,lights worked again,much lighter than the carpark.At 5.30pm they switched off and it was dimmer than earlier on.No futher issues on the way home.
I had them fail to turn on once before at night too.Ive had very erratic operation of the auto wipers,like wiping with no rain and not wiping in pouring rain.
In this case the windscreen was spotless clean,still has no bugs after a trip up and back to the city.
Anybody had issues with their auto lights????
Andrew

Tombie · 5th May 2015, 10:20 PM

Won't be Lucas

Ford/Bosch...

Occasional wipes randomly are normal. Something hits then passes the sensor... In pouring rain if at minimum sensitivity they can take a while as it has to hit spot on to trigger..

As for the lights - can't help there.

**Fred Nerk** · 5th May 2015, 10:31 PM

Sorry to hear this, Andrew. I have auto headlights and auto highbeam. They have worked perfectly for three years and a bit longer. I have heard of people having problems because of issues with the sensor and because of a residue on the glass after cleaning with some glass cleaners.

Have you tried rubbing the glass over the sensor to remove any film?

**SilvaD4** · 5th May 2015, 10:42 PM

Originally Posted by Fred Nerk

Have you tried rubbing the glass over the sensor to remove any film?

I would have thought that a dirty sensor would make the auto-headlights come on sooner

**LandyAndy** · 5th May 2015, 10:49 PM

Windscreen was perfectly clean,it got a good wash a couple of weeks ago and hasnt been driven and locked in the shed since.
I expected Mr Shrek(Tombie) to post it was the Fyrlyts are too bright

Wondering if the sensor has an issue,both wipers and auto lights are in the same module arent they????
Andrew

**SilvaD4** · 5th May 2015, 10:59 PM

Originally Posted by LandyAndy

Wondering if the sensor has an issue,both wipers and auto lights are in the same module arent they????
Andrew

From my reading of the Exterior Lighting wiring diagram for a D4 (417-01), the Sensor-Rain-Ambient Light (T328) are one and the same.

**LandyAndy** · 5th May 2015, 11:15 PM

Originally Posted by Tombie

Won't be Lucas

Ford/Bosch...

Occasional wipes randomly are normal. Something hits then passes the sensor... In pouring rain if at minimum sensitivity they can take a while as it has to hit spot on to trigger..

As for the lights - can't help there.

Have adjusted min to max and all points inbetween when they dont wipe on auto.Normality resumes and they work perfectly

.
Andrew

**nat_89** · 6th May 2015, 05:47 AM

Haha yeah my lights come on in the middle of the day for some unknown reason but they have never failed to turn on, only just sometimes come on in broad day light. As for the auto wipers have to agree oh my god freaking silly things they do the same no rain clear day and they randomly wipe and then ****ing down and they go slow, as you said Andy I've tried all settings no difference usually leave it one click on the minimum half side, but still annoying I end up turning them off on long highway trips stops them smudging bugs when they random wipe.

**BMKal** · 6th May 2015, 11:04 AM

Andrew ............... the issues you are seeing are because of the colder weather.

You're getting a SNOWFLAKE stuck on your light / rain sensor.

**scarry** · 6th May 2015, 06:17 PM

The easiest way to sort out the issue is not to use auto lights or wipers at all

I had the wipers on auto accidentally the other day,and they came on and smeared 550k's worth of bugs across the screen

It was just on dusk,i had to stop and clean the screen,couldn't see a bloody thing,washers didn't help either

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