Lancia Motor Club Forum Banner
14 May, 2021, 11:31:35 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Need to contact the Forum Administrator? e-mail forum.admin@lanciamc.co.uk, for Database Administrator e-mail database.admin@lanciamc.co.uk      -      Copy deadline for Viva Lancia is 12th of each month.      -      For Events e-mail events@lanciamc.co.uk      -      To Join the club go to http://www.lanciamc.co.uk/join.htm
 
   Home   Help Search Calendar Register  
Pages: [1]   Go Down
  Print  
Author Topic: S1 Coupe headlamps  (Read 1029 times)
0 Members and 2 Guests are viewing this topic.
simonpen
Member
****
Posts: 87


« on: 14 January, 2021, 02:58:35 PM »

I am about to re-fit the headlamps to my S1. Currently the outer lamps are fitted with H4 bulbs and the inners old-fashioned Duplo bulbs. Neither seemed very bright before the car was dismantled but I am hoping the improved earthing of the car during re-assembly will improve them. I have noted the conversations about fitting relays elsewhere on the forum but have not yet done this. My question is; which filament in the three prong Duplo is activated when full beam is activated and would fitting a H4 bulb to the inners work in the same way? I have purchased some adapters which would enable the fitment of H4 bulbs to the inners but can see no way of fitting a H1 bulb. Thankyou.
Logged

1969 Rallye 1.3S
Derek Creasy
Member
***
Posts: 41


Here's to sunnier days


« Reply #1 on: 14 January, 2021, 04:05:43 PM »

Hi Simon . I got over the problem of abysmal lighting on my 2000 Coupe by buying 4- 53/4" H4 headlamp units and wiring up by doubling up the relays for the near side .  I now have 4 x 55w on dip beam and all 8 filaments 4 x 55w  plus 4 x 60w   (yes 460 watts in total) on main beam. The warning light glimmers at low speed on main beam but at least I can see where I am going  .  To keep it all looking right , I removed all the glasses and siliconed the old Carello ones back on to the new H4's .  It was about 4 years ago but if I remember correctly the 4 units including bulbs cost me 44 total plus a couple of old relays , an extra fuse box and some wiring . The difficult bit was separating the old glasses from the reflectors without breaking them. Another small advantage is that it now has 4 sidelights instead of 2 .  All non-original but I would rather see and be seen .
Logged

2000HF Coupe          1972
Fulvia Sport  1.3S     1968
Delta 3 2.0 Limited   2012
simonpen
Member
****
Posts: 87


« Reply #2 on: 14 January, 2021, 09:03:14 PM »

Thanks Derek, I shall at some point replace the lamps but for now I just want to get the thing back on the road. I probably didn't phrase my question clearly though; how does a H4 or Duplo 3 prong bulb work when connected when connected to a 2 pin connector block?
Logged

1969 Rallye 1.3S
davidwheeler
Permanent resident
**
Posts: 1199



« Reply #3 on: 14 January, 2021, 11:03:42 PM »

An H4 has two filaments. one main beam, one dipped.  The third prong is earth.  You choose which of the two filaments to connect to but cannot have the H4 operating Main and dipped only main or dipped.   As I understand it the Series 1 Fulvia has a pair of dipped bulbs, permanently on and a pair of three prong main/dipped bulbs.
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
Derek Creasy
Member
***
Posts: 41


Here's to sunnier days


« Reply #4 on: 15 January, 2021, 08:47:37 AM »

Thanks Derek, I shall at some point replace the lamps but for now I just want to get the thing back on the road. I probably didn't phrase my question clearly though; how does a H4 or Duplo 3 prong bulb work when connected when connected to a 2 pin connector block?
It can't , you need a 3 pin connector (readily available on eBay.) and a 3rd wire for both filaments to work
Logged

2000HF Coupe          1972
Fulvia Sport  1.3S     1968
Delta 3 2.0 Limited   2012
simonpen
Member
****
Posts: 87


« Reply #5 on: 15 January, 2021, 03:19:20 PM »

I think I have answered my own question. According to various web-based 'experts' the two opposing prongs on a H4 are earth and main beam, the other prong (at 90 degrees) is for dipped. This would explain why my lights worked. My S1 is wired so that the inners, along with the outers, come on when main beam is selected, and off when dipped.
Logged

1969 Rallye 1.3S
lancialulu
Press Officer
Permanent resident
*****
Posts: 4216



« Reply #6 on: 15 January, 2021, 03:58:15 PM »

My S1 is wired so that the inners, along with the outers, come on when main beam is selected, and off when dipped.
That is correct....
Logged

Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
simonpen
Member
****
Posts: 87


« Reply #7 on: 19 January, 2021, 08:40:45 PM »

On a similar note how do LHD lamps differ from RHD. Is it the glass or the mount? Is there enough adjustment if the wrong ones are bought?
Logged

1969 Rallye 1.3S
lancialulu
Press Officer
Permanent resident
*****
Posts: 4216



« Reply #8 on: 19 January, 2021, 10:15:55 PM »

Inner driving light is the same. Outers throw a different beam pattern (shown in all Haynes manuals....) RHD kicks up to the left on dipped and visaversa. MOT fail.
Logged

Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
Derek Creasy
Member
***
Posts: 41


Here's to sunnier days


« Reply #9 on: 20 January, 2021, 04:39:18 PM »

Which is why you need to be cautious if buying second hand units , they may be from an unchanged import with RH dip
Logged

2000HF Coupe          1972
Fulvia Sport  1.3S     1968
Delta 3 2.0 Limited   2012
Pages: [1]   Go Up
  Print  
 
Jump to:  

Contact the Forum Administrator

LMC Forum copyright © 2007 - 2021 Lancia Motor Club Ltd

Powered by SMF 1.1.20 | SMF © 2006-2011, Simple Machines
Page created in 0.047 seconds with 20 queries.