Back in the day, like PV days, it was not uncommon esp. on British cars to mount one spot lamp and one fog lamp; does anyone know which one goes on the driver's side and passenger side on a LHD vehicle? I think the spot goes before the driver looking down the road, and the fog is curb side, but I'm not certain.

Thanks!

Thanks for all the comments.

I ended up wiring completely independent from the factory lighting - one switch for each light, with their own fuses, relay, and power from the battery. I know I should set up the spot lamp to tie in with high beams and my 240 is set up that way, but to be honest, I'll use these 'in action' so rarely I'm not too worried - probably only completely empty country roads like once a year.

Funny, I was expecting the little generator light to come on when these lamps were on, esp. at idle, but it doesn't come on. Maybe I'm just draining the battery and the system doesn't know it?

I did manage to score a local rebuilt SEV Marchal alternator from a 140 (I think - its been a while) and appropriate brackets so I'm set up to do the upgrade if needed.

SG;

The way it's connected in the system, the AMP Indicator is just not that smart, so if your pulling more current with lights, than Chg Sys can supply, the Battery must, and will contribute...needle of an Amp meter would be pretty clearly in the negative, would let you know Battery was Discharging, a Voltmeter would be down, but you wouldn't necessarily know you were in a Discharge condition...perfect example of why I dislike Voltmeters!

Cheers

You have it right. Fog lights up the kerb or roads edge and the spot looks ahead for things in the distance. The 123GT Amazon came with spot and fog as standard.

Hi Derek,

Thanks very much. Do you also know if the traditional set up (123GT or MGB etc...) would run these on two separate switches (one for fog and one for spot) so they could be used independently or at the same time?

Regards,
C

123GT had a pair of pull switches under the edge of the driver's side dash. They are the same switches as used for the under dash light above the passenger side shelf. Ergo, use either or both. MGB, not factory so would be owners choice.
There are actually 3 choices of lamp, or were when these additions were common, fog for fitting low to get under the fog and light up the road edge, driving, for general extra light and to extend the range of the standard lights and spots for concentrated light for extra range. Spots OK for deer spotting but often failing to give extra light where you most need it. Set up any of these lights to give the best coverage for you and your style of motoring. Taking your spanners with you to a flat straight road on a very dark night is very worthwhile. Spots and driving lights should always be wired to switch off when you switch down to dipped beam. due to oncoming traffic. Beware, this can leave you instantly "in the dark" if your extra lights are very bright!

Chris;

Good info from Derek...to go with that, note that Fog and and Driving light location would change for LHD vs RHD countries. I also recommend not adding the additional lighting load current to an OE Generator based Ch Sys...it essentially would mean any time one of those lights is ON, Battery is not being charged, possibly even being discharged (with additional lights with two 55W elements blazing away, the later would definitely be the case!)...if you are considering additional lighting, you should also seriously consider increasing output of Ch Sys.

Cheers

For Fog lights, I would recommend wiring the relay so that it gets power from the Parking lights rather than the headlights. Parking lights are always on when headlights are on, but the reverse is not true.

The reason for wiring Fog lights ( NOT driving lights ! ) this way is that during severe weather like heavy snow or fog, the headlights, even on low beam, reflect back too much from the snow / fog and seriously hurt the effectiveness of the fog lights, which should be mounted as far below the driver's line of sight as practical - like under the bumper, or in the lower part of the fascia.

Having driven in conditions when snowflakes are as large as a half dollar, or in heavy fog, I always find that turning off my headlights and using the Fog lights was far superior to trying to see past the glare from the low beams. Since the tail lights and parking lights are still on, I have never been pulled over for having the Fogs on without the headlights on in over 40 years, whether on the California side of Donner Pass, or in Nevada. Sadly, the OEMs don't wire cars this way, due to DOT rules made up by some bureaucrat with no experience decades ago. Fortunately, one can always add Fog lights to a vehicle, and wire them for the best visibility themselves.