If you had the reg unplugged as well as removed, then it looks like you have a wiring problem. Probably the wire from the idiot light to the reg (the thin one) is some how getting power to it, probably a short in the loom or the plug.

If you didnt have the reg unplugged, you have proved nothing.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving