[TR] TR6 Wiring Question

[Jeff Scarbrough]

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...


-- 
No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.484 / Virus Database: 269.12.0/959 - Release Date: 8/17/2007 5:43 PM