Some dimming of headlights at idle is to be expected. Your tach problem
could be due to a bad ground, there should be a black ground wire to each
gauge for the panel lights. In the case of the tach this is required for
the tach electronics also. Without it the tach will 'see' a ground through
its panel light to the red/white and from there through other panel lights
to their grounds. With the lights on, depending on how bright they are set,
the operation of the tach will be affected to some degree.
----- Original Message -----
From: "Mark Smith" <mark.smith@optushome.com.au>
To: <mgs@autox.team.net>
Sent: Saturday, March 23, 2002 12:29 PM
Subject: Minor electrical problem
> Hi guys....
> I've noticed that when I turn the headlights on in my 1967 B the
brightness
> varies with the engine revs. Also when the engine is idling with the
lights
> on the tacho falls to zero for a second then comes back up despite the
> engine running fine. The car is fitted with an alternator , not the
original
> generator and is negative earth. Any suggestions????
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