There is control circuitry that manages the oil pressure LED.  I know,
because mine is on the fritz, too.  I checked to ensure that the circuit was
seeing ground from the sensor, then replaced the LED.  Still no luck.  I've
got the instrument cluster on my kitchen table right now, but it's
difficult/impossible to trouble shoot the circuit, especially without a
diagram!  Maybe a Bentley has more info, but I suspect it's a custom
integrated circuit that I'll have to replace.

Of course, Andrew Fox (of this list) suggested I throw out the LED in favor
of a guage.  I may do that.

Dave in KC
85 Westy
http://members.fortunecity.com/davebaker1

----- Original Message -----
From: Greenamyer, William L <William.Greenamyer@WEST.BOEING.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, October 29, 2001 12:37 PM
Subject: Oil pressure LED

> Got a little technical question here.  I haven't looked at it closely yet
> but my LED came on very erratic this morning.  Could not find anything
> wrong.  No running problems.  New pressure sense switch installed Sunday.
> No shorts in the wire.  All clean.  LED came on after about 40 miles of
> driving.  I was wondering if the LED is actually driven by a transistor or
> some other type of indicator driver or is the LED hooked up to +12 through
a
> resistor and the other lead goes directly to the pressure sensor switch?
> Anyone know off the top of their head?
>
> William