Two semi-urgent wiring questions

[Boots]

Ok,
I am trying to get my bus ready for a big trip in about a week, and have two wiring questions for anyone out there.
First the vehicle is a 77 Riviera FI 2.0L
1) I am trying to replace my original isolator with a relay, since the diodes are shot. The isolator is a 4 prong. Each battery has one, there is one for the alternator, and one connected to the red wire from the regulator. To wire in the relay, I just need to connect the two battery cables, and wire in the blue idiot light wire. The alternator wire goes back to the primary battery. (Correct me if I am wrong on this). My question is where does the red wire connect to? If I am reading my wiring diagram right, it goes to the D+ terminal on the alternator. Where on the alternator is this located?

2) Ok second question. While poking around trying to fix the first question, I noticed I have two unconnected wires from my FI control unit. There is the big thick insulated group that runs to the injectors, a single wire running to the ignition coil, and then two that just end. Where on earth do they go to?

Thanks for any help you can provide.
Dave

[Karl]

2) the two wires that come out of the FI harness right past the bend by the air filter go NOwhere on a USA bus. They would have gone it a high altitude switch on a European bus.

[Boots]

Thanks Karl. A lot of things in my bus were just randomly connected (the oil pressure wire went to the tach connection on the coil). It's good to know I can forget about those two.
I think I have the first question figured out. The red wire was cut just inside the shrink wrap, so I just hooked back into it.

Dave

[twinfalls]

[Duncwarw]

Why not just replace the isolator. It has an advantage over the relay as the batteries are "isolated".
_________________
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[Amskeptic]