I have a 1975 TR6, and I want the oil pressure light to
illuminate...all I can get is a dull glow.
Using the handy wiring diagram at
http://www.advanceautowire.com/tr2506.pdf I see that the current for
the oil pressure warning lamp must also pass through the brake
failure warning lamp. Poking around with my voltmeter, I discover
that the brake lamp has 12V available into it, but since the oil
pressure lamp is "downstream", it only has a bit over 6V
available. No wonder it barely glows. I unplugged the wire at the
PDWA, but that made no difference. In fact, if that switch were
grounded, there would be no oil pressure light glow at all...
I assume it is meant to be this way, but I can't see any way for the
oil pressure lamp to get a full 12V, and I see no indication that a
6V lamp should be installed in place of the normal lamps.
What were they thinking when they designed it this way? Is there
something that I'm missing?
Jeff Scarbrough
Perplexed, Ga.
Spitfires and a TR6
P.S. Yes, I am aware that there is a gauge, but I'm a belt and
suspenders guy, especially since the belt and suspenders came with the pants...
--
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