The alternator on my harness is wired into the harness that comes from the firewall. If that wire is hooked to the relay it potentially is always hot if its not wired into the ignition circuit. What that may cause I'm not sure.
Maybe they had to wire it differently for the GM alternator. I am in the process of cutting unnecessary wires out of my harness and replacing the bad ones I need. Jeep used an awful quality wire because when it gets hot the insulator falls off and leaves bare wires all over. I plan on a full rewiring when I get back home.
Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG