confused

C

Charles Roberts

New member
I changed the original 345 v8 in my 1979 scout to a gm 350 with hei distributor and a one wire alternator. I am having trouble determining what original wires go to the starter solenoid.
Please help
 
Do you have any wires hooked up there yet? Is the wiring harness original, heavily modified, or aftermarket?

The most obvious place to start is the 4ga or larger cable originating from the battery POS terminal. Only one place it can go, the large solenoid terminal. Then you've the main power feed into the cabin, which will be a 10ga wire that runs up to the firewall bulkhead connector, into the cabin and ends at one of the Ammeter gauge terminals, identified as circuit 14-10. It should have a large ring terminal connector on it, thus also limiting it to one obvious terminal. Since this is a '79 and would likely not have had a breaker points distributor, then one of the two small solenoid terminals labeled 'R' would thus also not have had any wire connected to it. That will carry over to your present HEI distributor. Being electronic, there is no need for a resistor bypass feed from the solenoid 'R' terminal to the coil POS terminal. The other small solenoid terminal is the 'S' for START terminal. That will need to have a 14ga wire with a small ring terminal connected to it, identified as circuit 17-14. This wire also passes through the BHC after originating from the IGN switch. That should leave you with only one more wire down there, that being circuit 7-16 with a large ring terminal on it. That wire runs from the large solenoid terminal up to the #2 terminal on the Delco 10si three wire alternator. I'm unclear as to what roll if any that wire has with regards to your one wire alt setup. But at least that should have everything identified for you. There aren't that many wires down there and different ring terminal sizes do help with the process of elimination.
 
Thanks for the reply.
May I pick your brain with the following. I am trying to understand the complete system.

These are the original wires but have had the terminal ends removed previously.

Question 1 - Wire at K connector labeled AX-95 is hot with the key on but goes open with key in start. ?

Question 2 - Wire at K connector labeled BY-95 is hot with the key on and stays hot with key in start. ?

Question 3- Wire at K connector labeled BY-16 is hot with the key on and stays hot with key in start. ?

Question 4 - Wire at M connector labeled #2 is hot with the key on and hot with the key off. ?

:crazy:
 
You'll have to provide some good pictures of what you're asking about, because I have no frame of reference to them. In other words, I have no earthly idea what you're talking about...connector this and connector that. That isn't how the original Scout circuits were identified.
 
Ok. You transitioned from the solenoid up to the BHC and I didn't pick up on the location change. I thought we were still talking about solenoid connections. Let me ruminate on this for awhile now that I'm on the same page and I'll get back to you.
 
This is going to be a little tricky. Reason why is because I have a '74 Scout and FSM to match. You have a '79 and matching FSM. The '79 BHC arrangement was updated and improved over prior SII model years. They're not the same. So the information that I have at my fingertips is not the same as what you have.

That said, Circuit 2-10 is ALWAYS meant to be the feed from the NEG side of the Ammeter gauge OUT through the BHC to the alternator BAT+ terminal. I think that holds true no matter how many wire alternator configuration you've got. It will always be hot as long as your battery has charge in it, your battery cables are hooked up at both ends, and circuit 14-10 adjacent to 2-10 is connected at both ends. This is the loop from the battery to the alternator with several junctions and distribution points in between.

Circuit 16, to the best of my knowledge, is always going to be the switched feed to your coil POS terminal, which also functions as your kill switch when you want to cut the engine. So it needs to be hot in both ON/RUN and START switch positions, but dead in all others.

Circuit 95 is listed in my FSM as being emissions equipment related. You'll need to do a deeper referral and tracing of your own FSM to determine how it factors in with your particular vehicle. That one is beyond my pay grade.
 
Your are a gentleman and scholar.
Thank you for sharing your knowledge. IMG_1637.jpg
 
Dat's alotta bling! Hope the overall picture is a little less fuzzy for you now. Good luck getting it all sorted out and buttoned up. You're probably not too far off.
 
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