JohnMcNutt
Industrial
I work on a lot of small equipment that has similar belt drive alternators from Mitsubishi, Denso, and Hitachi.
From time to time they fail and I need to retrofit one for another or deal with start disconnect circuitry and other things that require me to understand the circuit more than just hooking the wires back where they say they go.
Generally speaking there is always a lamp terminal, which I understand, as they have been there more or less since 1960.
The others not so much. There is often an I wire which I presume is switched ignition, but what would its purpose be besides what the lamp wire already provides, especially since this terminal is often not connected?
Sometimes there is an S wire but all units I work on pretty much never use it, I presume because they are sensing on the output wire.
There is sometimes another letter designation which escapes me right now but I have not seen one with more than 3 auxiliary terminals.
And are there any OE manuals or discussion that describe the function of these terminals in more detail? Internet searches have turned up very little.
From time to time they fail and I need to retrofit one for another or deal with start disconnect circuitry and other things that require me to understand the circuit more than just hooking the wires back where they say they go.
Generally speaking there is always a lamp terminal, which I understand, as they have been there more or less since 1960.
The others not so much. There is often an I wire which I presume is switched ignition, but what would its purpose be besides what the lamp wire already provides, especially since this terminal is often not connected?
Sometimes there is an S wire but all units I work on pretty much never use it, I presume because they are sensing on the output wire.
There is sometimes another letter designation which escapes me right now but I have not seen one with more than 3 auxiliary terminals.
And are there any OE manuals or discussion that describe the function of these terminals in more detail? Internet searches have turned up very little.
