Bill Knecht
Member
Greetings,
I hope my "newbie post" won't reveal too much ignorance, but, I'm trying to understand wires on a 1971 MF135 Deluxe that suddenly wouldn't start. This machine started life with a generator, replaced sometime in the past with an alternator, and that's the part I'm stuck on. I tried Search on "alternator", but it would've taken about a week to read every single post, so here I am, hat in hand, hoping you won't thrash me if this subject was discussed already somewhere else.
My question is this: Can anyone tell easily from my photo whether this Delco-Remy alternator has a built-in voltage regulator? It's confusing because the 4-pin "F 2 3 4" VR was still in place, right near the battery, but only the "F" and "3" wires were still attached to the 4-way connector that was plugged into the VR. The "2" and "4" wires had been cut, and the water temp and fuel level gauges removed. I'd like to replace those, but I can't make much sense of wiring diagrams because every one I've seen is so small that their smallest print re the VR terminals is unreadable. Bottom line -- I don't want to try to hook up an alternator to an external VR if it already has one, as you can well imagine.
As the picture shows, there's only one wire bundle attached to the alternator. I've labelled that "A". "A" has two wires, plus a third that's been cut. "A" seems to be electrically isolated, so I think that's where the generator fuse is. There's a ground wire nearby, disconnected, that also has a wire that's been cut, and I suspect those two cut wires were once joined. The alternator has no part number on it. That's long gone. It just has "BAT" on the back in raised letters near "A". Plus, it has "R", "R", and "F" near the top, positioned as shown by the yellow arrows.
Any help here would be most appreciated. And, I do apologize if this topic has already been discussed.
I hope my "newbie post" won't reveal too much ignorance, but, I'm trying to understand wires on a 1971 MF135 Deluxe that suddenly wouldn't start. This machine started life with a generator, replaced sometime in the past with an alternator, and that's the part I'm stuck on. I tried Search on "alternator", but it would've taken about a week to read every single post, so here I am, hat in hand, hoping you won't thrash me if this subject was discussed already somewhere else.
My question is this: Can anyone tell easily from my photo whether this Delco-Remy alternator has a built-in voltage regulator? It's confusing because the 4-pin "F 2 3 4" VR was still in place, right near the battery, but only the "F" and "3" wires were still attached to the 4-way connector that was plugged into the VR. The "2" and "4" wires had been cut, and the water temp and fuel level gauges removed. I'd like to replace those, but I can't make much sense of wiring diagrams because every one I've seen is so small that their smallest print re the VR terminals is unreadable. Bottom line -- I don't want to try to hook up an alternator to an external VR if it already has one, as you can well imagine.
As the picture shows, there's only one wire bundle attached to the alternator. I've labelled that "A". "A" has two wires, plus a third that's been cut. "A" seems to be electrically isolated, so I think that's where the generator fuse is. There's a ground wire nearby, disconnected, that also has a wire that's been cut, and I suspect those two cut wires were once joined. The alternator has no part number on it. That's long gone. It just has "BAT" on the back in raised letters near "A". Plus, it has "R", "R", and "F" near the top, positioned as shown by the yellow arrows.
Any help here would be most appreciated. And, I do apologize if this topic has already been discussed.