In article ,
Trevor Smith wrote:
I used to have an old 1970s triumph dolomite and that had a relay and
resistor block in the boot that dimmed all the rear lights if you had
the headlights on

Why would you want brighter tail lights in good visibility than bad?

More likely it dimmed the brake lights. As they have to be seen in
daylight.

--
*Learn from your parents' mistakes - use birth control

Dave Plowman London SW
To e-mail, change noise into sound.