18-03-2018, 04:17 AM
(This post was last modified: 18-03-2018, 04:24 AM by Tony Press.)
(17-03-2018, 03:28 PM)JonE Wrote:(14-02-2018, 12:10 PM)Stuart Joseph Wrote: In an earlier posting it was explained that sidelights and headlights are achieved with single filament bulbs by switching the lamps in series to give a 3v output (sidelights) and parallel to give a 6v brighter output (main).
Was just searching for that thread. I notice that the wiring diagram from 1925 shows a single wire and refers the the button to do what Stuart refers to above. This later one refers to R510s, and has the twin wire to the single bulb, but seems to suggest that the current flows in to either dependent on selection of full or side? This must be determined wholly by the dash panel unit switch presumably?
Would I be right in thinking that the later switch panel thus isn't ideal for retrofitting R510s, as it will be issuing different orders from the switch to the later R47s?
The Lucas SM 3 panel has 'H'ead and 'S'ide headlamp switch position, which I believe uses the two wires running to each Lucas Headlamp R510, which is fitted with a single two filament two pin bulb- I presently use 6 volt BA15d 18W 5W Stop and Tail (probably should use BA15d 21W 6W).
The Lucas SM5 panel also has 'H'ead and 'S'ide beam switch position which connects the two wires to two separate bulbs in the Lucas Headlamp R47 - I use 6 volt BA15s 21W and BA15s 6W bulbs. The main bulb has a three position seating but as mentioned, with present bulbs this doesn't seem to help very much with focus.
Never tried LEDs but as far as I know there are no two filament LEDs for the Lucas R510 headlamps and I would I think that focussing in the Lucas R47 headlamp could be a problem
Cheers, Tony.