E21 headlights

For all your questions, problems and DIY stories
Post Reply
induzido
Newbee
Posts: 1
Joined: Thu Dec 30, 2021 1:37 pm
My E21(s): E21 315, year 1983 , europe

E21 headlights

Post by induzido »

Hello friends i just bought a E21 315 With four headlights.
i have a doubt about my headlights. When i passed from low beam to high beam the lower turn off and the high turn on.

My question is IF when i pass to high beam the low beam must stay on?


User avatar
BertjeConti
E21 Mad
Posts: 3007
Joined: Mon Nov 04, 2013 9:49 pm
My E21(s): E12 520-6
Location: nederland , Weert

Re: E21 headlights

Post by BertjeConti »

Yes low beam must stay on, when switched to high beam on the dual unit headlights setup.

If you have the single low/high units, then only low or high is on, never both, because the h4 dual filament bulb can't handle the heat if both filaments are on together.

I gues your car is converted from single to dual headlight setup.
Image
Megasquirted '77 E12 520-6

Aspen Silver '96 E39 523i
User avatar
nic65
Upcoming E21 fanatic
Posts: 131
Joined: Tue Sep 18, 2018 2:12 pm

Re: E21 headlights

Post by nic65 »

the fuse / relay box is different for 2/4 headlights ... I modified mine to keep the low beams on
LloydRT
Newbee
Posts: 16
Joined: Tue Aug 31, 2021 8:34 am
My E21(s): 320i

Re: E21 headlights

Post by LloydRT »

nic65 wrote: Thu Dec 30, 2021 7:06 pm the fuse / relay box is different for 2/4 headlights ... I modified mine to keep the low beams on
Was the conversion easy? My uncle recently acquired this E21 and he wants to upgrade the headlights and the head unit. We'll work on it after we finish installing the skid plates and jeep tops on his Wrangler.
User avatar
nic65
Upcoming E21 fanatic
Posts: 131
Joined: Tue Sep 18, 2018 2:12 pm

Re: E21 headlights

Post by nic65 »

I did the work a few years ago, I remember having reached a connection inside the fuse box after studying the diagram of the 2 versions
LloydRT
Newbee
Posts: 16
Joined: Tue Aug 31, 2021 8:34 am
My E21(s): 320i

Re: E21 headlights

Post by LloydRT »

nic65 wrote: Mon Feb 14, 2022 9:02 am I did the work a few years ago, I remember having reached a connection inside the fuse box after studying the diagram of the 2 versions
Alright, thanks!
e21Keith
E21 Fanatic
Posts: 476
Joined: Sun Jan 05, 2014 7:44 pm
My E21(s): '81 323i Manual

Re: E21 headlights

Post by e21Keith »

The fusebox is indeed different. I just bought a new 320/6 fusebox, not that expensive and quite easy to fit. There is also a different headlight loom for the 4 headlight cars, so simple plug and play with the right parts
Post Reply