"Greenamyer, William L" wrote:

> 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

What year is your van?
Did you install a new pressure switch at the back of the engine near the pulley?

Often the dealers give you the 1.8 or 1.6 bar sensor when it should be the .9
bar.
  This causes a lot of unwarranted buzzing, flashing, and worrying.
Of course if you didn't note the info stamped on it before installation, its a
lot of trouble to take out just to check.  BTDT

Larry A.
91 GL