>There appear to be 2 wiring diagrams for an 86 w/digifant. From what I
>can see, wire from D+ of alt goes to T2j which is a two connector
>"under instrument panel left". Check there. Bue wire also goes to inst
>cluster at alt. warning light. I imagine that is part of a multi
>connector.

Gregor,

I am with Neil on this one.  I don't think you have a choice but to
backtrack up the wire until you find the fault.  Good luck.

Jake