Surprisingly, you're both somewhat correct. The E28 low/high beam
outer light *does* use a two-filament bulb in all markets. (Burns is
In North America, the OEM is a 5 3/4" sealed beam and popular
conversions are Hella and Cibie 5 3/4" H4 two-filament lamps. In the
NA market *only*, both filaments are used as God intended: low beam for
low illumination and high beam for high illumination. Along with the
high beam filament, the inside single filament H1 lamps are
In other markets, the E28 has a 7" low/high outer light (highly coveted
by E28 enthusiasts in the US, I might add) but for some inexplicable
reason, the high beam filament in the H4 bulb is never used! In fact,
it isn't even *connected* in those cars! Therefore, what the OP is
seeing *is* normal for that car. (Burns is right)
Now, while the 'Euro Purists' here in North America all want to wire
their lamps to do exactly what their Euro/UK brethren see (You oughta'
see what they'll pay for those smaller Euro market *bumpers*!), I
personally say, SCREW THAT! I yanked off the stupid connectors and
plugged those H4s and H1s right onto my OEM wiring harness! That
leaves me with the minor problem of finding a voltage source for the
15W 'city lights', but compared to being able to *see for two miles*
(as well as melting the paint off the rear end of any moron who crosses
me at night), that's a 'kewl' thing I can live without.
(Been there; done that)
On my old Rover P6, which originally had Lucas sealed beam lights which
really gave the name to the 'Prince of Darkness' - ie 37 watts of tungsten
on dip, although not too bad on main, I changed to four identical CIBE
units with H4s? and arranged for all four dip filaments on dip, then
simply added the mains on top. So some 440 watts on main beam. And a
larger alternator which would happily maintain 13.8 volts regardless.
65/03 cable off the main battery feed to relays situated as close to the
headlamps as possible.
And a non tint windscreen. Best lights I ever had. ;-)
*"I am " is reportedly the shortest sentence in the English language. *
Dave Plowman email@example.com London SW
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