Handbook states originally Lucas 416 12v 60/40 double filament. Can anyone recommend modern (halogen?) replacements? Is it just a matter of changing bulbs over, or is there any work required to the bulb holder?
Post by stantondavies on Sept 8, 2009 11:02:09 GMT
I have 75/45 sealed beam units on my MkIII, as original. But I have used Halogen bulbs as direct replacement on other Lucas lit cars. Usual caveat, be careful not to touch the glass on the bulb when fitting.
I endorse the above but fit a relay to protect the main switch which will overheat and burnout the wiring.
Yours should also have the obsolete and ineffective Lucas PL lamps which will spoil the headlamp pattern with halogens and may cause glare/MOT faliure.
It is best to replace the whole lamp unit with modern upgrades anyway see Vehicle Wiring Products or any LR site
I agree take the load off the HL switch with relays if you are going to up rate the wattage but 60w of tungsten is the same current as a 60w Halogen so no need to panic as long as the wattage is the same
If the Mk3 has 75w as standard? it gives a margin of 25% as the current will be 12.5 amps against 10 amps for the 60w
Post by Phil Nottingham on Sept 8, 2009 19:07:27 GMT
The switch is very unlikely to be up to scratch for realistic use after 45 years and a relay will protect it almost indefinitely as once its has started to overheat it will very quickly fail even on low watt dip beam
Phil - 1964 P5-Coupe PMB***B & P5B-saloon LHO***L & other classic Rovers & Land-Rovers