on your diesel van, remove the wire from the OP switch at the forward
end of the cylinder head and ground it, like with a small jumper wire
which should be in your kit with your 12V test light at all times.

Then turn on the key.

if the LED comes on, the entire circuit is working except for the OP Switch.

this is the first , easiest, and most no-brainer test for this circuit.

also ..wiggle the instrument cluster conneciton T14 ..easy to have
dodgey contact there.
On 9/11/2014 4:33 AM, Jim Felder wrote:
> Was working when I parked my diesel 83 Westy last night. Cannot get the LED to come on this morning.
>
> where to look?
>
> Thanks,
>
> Jim