OK. I'm plinking away at this 1990 Chevrolet P60 van.

There's a problem with the front turn signals.

What appears to be a ground at both assemblies seems to have been deliberately cut.

If I reconnect these grounds they pull a LOT of juice, but don't blow a fuse. ( the other marker lamps dim down). However, on the left side, when I connected it, the blinker indicator (green light on dash) lights continuously. ( I think this is key).

I could use any assistance, particularly schematics.

Thanks .