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Headlight Switch
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Frostistamundo
- Newbie
- Posts: 3
- Joined: Wed Mar 30, 2022 2:34 pm
- Location: Little Rock, AR
Headlight Switch
#61319146288 Headlight switch. What does the small (sensor) to the right of the switch do/control?
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Zedebee
- Lifer
- Posts: 3395
- Joined: Tue Sep 29, 2020 10:37 pm
- Location: North Hampshire
Headlight Switch
It’s the rheostat that controls the brightness of the dashboard illumination.
2003 Maldives Blue 3.0i auto
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
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Mr Tidy
- Legend
- Posts: 23862
- Joined: Wed Jul 02, 2014 12:18 pm
- Location: North West Surrey
Headlight Switch
That's exactly what the thumbwheel does. 
Or do you mean the little dot between it and the switch? If I had to guess I think it might be a light to tell you the lights are on and your Z4 may be an E89, as my E90 has that too.
Or do you mean the little dot between it and the switch? If I had to guess I think it might be a light to tell you the lights are on and your Z4 may be an E89, as my E90 has that too.
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
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Rockhopper
- Senior Member
- Posts: 1116
- Joined: Fri Mar 06, 2020 7:05 pm
- Location: Mansfield
Headlight Switch
It’s some kind of daylight sensor I believe.
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Ben_Z4
- Newbie
- Posts: 9
- Joined: Tue Jan 09, 2024 3:30 pm
Headlight Switch
I'm interested in that too.
Also because in the day, my dashboard illumination was off and I wanted to switch it on, but couldn't find a way. Briefly thought it was broken, but then later when driving in the dark, luckily the dashboard illumination was on.
But does this sensor control the dashboard illumination? Or is the dashboard illumination switched on/off together with the headlights with the switch in Auto mode?
Also because in the day, my dashboard illumination was off and I wanted to switch it on, but couldn't find a way. Briefly thought it was broken, but then later when driving in the dark, luckily the dashboard illumination was on.
But does this sensor control the dashboard illumination? Or is the dashboard illumination switched on/off together with the headlights with the switch in Auto mode?