Re: Headlight woes, '84 5k

[Andrew Duane USG/PE <duane@zk3.dec.com>]

Hairy green toads from Mars made August Horch say:

> Hello fellow Q-heads.  In an '84 5kS, I've installed a set of
> high-output low beams.  Ever since, when the headlights are on, the dash
> warnings come on telling me I've got a burned out headlamp.  I'm
> assuming this is due to teh wrong voltage being used by teh newer higher
> output headlamps (which, incedentally, don't really seem to have
> improved a thing.)  Is there a way to hook up the new lamps in such a
> way that the computer isn't tripped by the wrong voltage or whatever,
> but still have it report when a lamp is truely out?  Many thanks...

I think it works on differential current (comparing the current
consumed by left and right lamps), not voltage. Are you using
one side only as a circuit through a relay to light both lamps?

-- 

Andrew L. Duane (JOT-7)			duane@zk3.dec.com
Digital Equipment Corporation		(603)-884-1294
110 Spit Brook Road
M/S ZKO3-3/U14
Nashua, NH    03062-2698

Only my cat shares my opinions, and she's too heavy to care.