That's a ground problem. Your grounds are rusty.
The key is that one bulb is dim.
Mike
----- Original Message -----
From: "Roadster" <roadster@texoma.net>
To: "Michael Shimniok" <michael.shimniok@usa.net>
Cc: <datsun-roadsters@autox.team.net>
Sent: Wednesday, December 05, 2001 11:41 PM
Subject: Re: Headlights
> Michael Shimniok wrote:
>
> > I'm confounded as to how the
> > wiring works. Can anyone spend 20 words explaining it?
>
> Mike, I've spent the last 20 years in industrial electrical,
instrumentation,
> and controls. The wiring on this car beats the hell out of me!
>
> Example: One night I noticed that one headlight was normal and the other
was
> very dim. The old tungsten headlights used to do this so I replaced the
> sealed beam. No change. I then noticed that the high beam indicator was
on
> but it was on low beam lights. Plus, the high/low switch had no effect on
the
> lights or the indicator. I spent many hours chasing around the schematic
and
> the car. I noticed that the left and right headlights have separate fuses
but
> paid little attention as the light was dimly lit. Finally, out of pure
> frustration, I took a look at the fuses. The one for the dim light was
> blown! I replaced it and all has been well for the last 25 years.
>
> I have since spent countless hours with a schematic trying to figure this
> out. The wiring in the car has been gone over completely: no sign of the
PO
> mucking about. I don't know if this is intentional or some kind of fluke
but
> there is nothing on the schematic to indicate why it should happen.
>
> In fact, if anyone can explain this I would like to hear it.
>
>
> Best regards,
>
> Fred Schroeder
> '70 2000
> SRL311-13359
> TDROC
> Home page http://home.texoma.net/~sitsinwest/
> Regular e-mail Sitsinwest@texoma.net
>
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