Today I finally got around to finishing wiring the tach in my 85
Wolfsburg Weekender.  It has an 87 dash that I put in months ago.

Only problem is that when I connected the wire to the coil, the oil
pressure alarm and light started going after a few minutes or when it
gets over about 3500 rpm - can't exactly tell what is the trigger
point.  Tach works great.  Nice smooth movement, reads exactly as one
would expect from the engine sounds.

Van has enough oil.  Oil pressure light and alarm don't come on when I
disconnect the tach wire from the coil, and didn't ever before today.
About 17k on a rebuilt engine from a very reputable rebuilder.
Seriously doubt I have oil pressure issues.  Oil pressure light, as
always, lights up at cranking and then goes out.  Reconnect and they do
come on.

Haven't driven it very far with it screaming at me.  Of course, the
first time it worried me seriously, but I was only a half a block from
the house.  Stopped, checked the oil, and drove back home.

Disconnected, no sounds, so I went for gas and another errand with no
indication of a problem.

So, is there some careless error I could have made in wiring, or
something about the 87 cluster that would cause this?  Or a likely point
for some sort of short in the cluster wiring?

For now the wire is not connected as I have to drive carpool 42 miles
round trip in the morning.

Thanks in advance for your help.  Not urgent, but it was frustrating to
think I had it all done correctly and then have this unexpected problem.

Sam

--
Sam Walters
Baltimore, MD

89 Syncro GL
85 Westy Weekender
84 Vanagon, original owner, soon to be retired, just too many problems

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