Strangely enough the lenses have recently dropped off both of my spoiler mounted fog lamps. When I bought the (blue) RR both spoiler lamps were broken and when I found that the power was not linked to main beam I assumed that they were fog lamps and replaced with the same. The handbook for the green RR clearly describes them as spot lamps - and they too are not linked to main beam. AFAIUI additional spot lamps must extinguish when main beam does. How do RR get away with it? Is this why you see so many w***********s driving with dip beam plus fog lamps now?
Easy answer on the RRC the spoiler lights are driving (spot) lights and work only on high beam, unless of course they are fiddled with - done by taking the switching current from the dipped beam circuit . You can save your self a mint by buying a pair of square 'Ring' spots at less than £20 which fit exactly and look the same unless you get really close to , the 'Ring' logo peels off btw and you can always print a tiny Landrover oval on self adhesive film if you want to be picky ( I did looks quite good actually ). If they are on the dip circuit you are required to have an illuminated indicator on the dash to show they are on.
That's how they are supposed to be wired, could/would fail M.O.T if you change it. Consider driving in thick fog where you would need the rear fogs lit in case someone came up behind you pretty quick, in those conditions you wouldn't want to be driving on main beam anyway. The thing that annoys me about rear fog lamps is when they leave them on when you *are* behind them and they *know* you are, in the same way that it's nice if I switch to side marker lamps when following someone in fog, it makes it easier for them to see without me half blinding them. The downside to that is if the fog is really bad then you need your own high intensity rears on but you can't do that on sidelights.
[1] the front fogs operate with either parking or dipped/main beam.
[2] rear high intensity lights only operate when either front fogs or main/dipped beam are on. i.e. they will not operate with only parking lights.
This is how I would expect the RR lights to operate. In fact that is how they work on my 88 Classic (now!). The requirement for more than parking lights is satisfied by it having Dim/Dip lights. Strangely that is achieved by electronics whereas my 90 Classic has a nasty dropper coil mounted next to one of the horns to drop the current.
The only 'illegal' enhancements are the way that the hazard light switch also controls the rear fogs if they are on. This has never fazed MOT testers - only brought smiles. Also I have fitted sidelights into the rear side reflectors - NAS spec I think - but wired the bulbs across the tail light and indicator supplies, using the filament of the unlight bulb as an earth path. I'll leave you to work out the lighting permutations when both tail lights and indicators are simultaneously powered.
the rear fogs get their switching feed to the relay from the dipped beam circuit when you turn to main beam you remove the feed and out they go, the wiring diagram is right near the end of the manual page 73 onwards I would leave that well alone btw as its wired according to regulations, telltale lamp and permitted usage -you wouldn't want to upsets Tony's Transport gang now would you
Ah I misunderstood the gist of the query but sounds right for the 1986 Construction and Use regs front fog lights may be used with or instead of dipped headlights ( so with sidelights per Saab) mind you without digging around I couldn't say for sure that some EU regulation has changed everything round, I do hate govt websites most are useless the rest are just blatent advertising. Derek
On or around Sun, 17 Dec 2006 11:38:01 +0000, Richard enlightened us thusly:
but it's not legal to use them with the dipped beams. AFAIK it's legal to have more or less any light that ain't blue or red on with the main beams.
It's supposed to be dip beams OR front fogs. Why TF the regulations don't call for cars to be made so that only one or tother can be on at the same time eludes me, it'd be a simple enough thing to do.
Thanks, Not bothered about any make in particular, as long as it's square and it fits in the 'ole! Unbelievably, the bulb still works, despite it being out in the elements for the few days. Must look like it has a bit of a squint though.
If you do manage to find one, let me know how much you want for it / them.
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