A lot of 12 volt car bulbs now seem to have only one contact at the base. so question for electricians, does this matter? If it matter, does anyone know a good supplier of double contact 12 volt 21 watt bulbs?

My bus number (if any): RTL 960 RMC 1458 RM 1585 and several RTs

It certainly does, the wrong bulb will blow the fuse.
Lucas are still listing 335 bulbs.

Thanks Roy will look for those bulbs.

My bus number (if any): RTL 960 RMC 1458 RM 1585 and several RTs

One of my Austrian customers couldn't get the right bulb so modified the contact of the bulb holder to use one pin; the other contact went to body.

Result? Positive earth fault, burnt-out gear control panel and 3rd gear permanently engaged, so a very expensive bodge. As discussed elsewhere!

My bus number (if any): RML2532 Keeping Europe's Routemasters on the road.

Brian

Most commercial factors should have Durite,Ring or Guardian bulbs all of which make the double contact types of 12v.

My bus number (if any): RCL2250

Remember Brian is in France and 2 pin bulbs are hard to get in Europe!

I've probably got a couple of boxes in stock.

My bus number (if any): RML2532 Keeping Europe's Routemasters on the road.

Thanks Ed and Roy, I found a caravan supplier in the UK who does these bulbs for £1 each and will post to us here in France at cost Can also get Lucas bulbs at £1,50 each.

My bus number (if any): RTL 960 RMC 1458 RM 1585 and several RTs

Brian

One company you could try online is www.autoelectricsupplies.co.uk, price for 10 12v 21w double contact medium globe bulbs, delivered by airmail to France is around £10 inclusive. They do have lots of other parts like relays etc, so its worth shopping around. Ed

My bus number (if any): RCL2250