Brian,
I only worked out the problem because when I checked the voltage at the back of the alt, I had 13.5 & 12 at the battery at the time. if I put the lights & other stuff on it got worse. Couldnt work it out as there was meant to be a couple of thick wires between the 2. The new wire fixed the voltage difference. I have no idea what is wrong in the loom with the original wires, will leave that for another time.

__________________
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