Re: 3 wire alt help
Okay, correct year and OE alt design has three wires
Blue & white for field winding, and red wire on BATT post.
No grounding wire as mounting in bracketry should ground the case.
Green wire could be from cylinder head temperature sender as it is, or could be, between Cyl's 1 & 3.
If not charging, voltage measurements across battery posts and BATT post to alt case should be within 0.2 volts of each other.
Tip: On horn relay buss bar, remove red wires and wire brush them and place red wires onto the same screw on buss bar.
At battery junction block next to battery, follow positive cable pigtail, disassemble wires, wire brush terminals, and reassemble.
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