Hi Mark
At 02:11 AM 12/3/2010, mark drillock wrote:
>Curious as to what was going on I unplugged the 2 pin again and bridged
>the in and out ends of the low switch wire with a test jumper so I could
>measure the voltage on the wire with the meter. NOW the light stops
>blinking when the engine starts and resumes blinking if I stop the
>engine by pulling the coil wire! WORKS normally.

Is this exactly correct?  I.e. with the low-pressure sender jumpered
(fault condition if engine running) the light nonetheless goes out
when engine is started?  I'm guessing you didn't mean that.

I'm sure you've already thought of this, but check to see whether the
high-pressure sender has failed short.  It may be that the L-board
logic recognizes that as a fault condition, which of course it is --
that sender should be open at zero rpm.  After I wake up again I'll
check to see how mine behaves with that sender grounded.

Yrs,
d