Hooking up an Alternator

pinball · Nov 8, 2017

Bought a delco alternator to put on my int 404. two wire alternator. How do you all hook it up. I have ran the red wire to the amp guage. From the amp guage I'm not positive about. The white wire goes were. thanks norm

Bob · Nov 9, 2017

If you are talking about a connector with the red and white wires that's plugged into the alternator, it's actually a "3-wire" alternator... the third wire, the heavy power output wire goes to the insulated stud terminal, that's the one that goes to the ammeter.

<img src = "http://www.gondtc.com/~blweltin/Bob/AlternatorHarness3.jpg">

An appropriate resistor or an "idiot light" using a 194 bulb or similar can be used instead of the diode.

Your harness would have the white wire going to #1 alternator terminal, and the red wire to #2.

The #2 terminal is the "voltage sense" terminal, in more exotic setups it typically runs to the (+) battery cable termainal at the starter switch or solenoid, for this simple tractor conversion, it can be simply jumpered to the output terminal, as shown.

Is this a connector you have?

<img src = "https://www.carpartsdiscount.com/auto/doc/M/3171440/0/3/T/acdelco-alternator-connector-pt2288.jpg">

Fatamus · Nov 9, 2017

WOW!!
way cool Thanks

pinball · Nov 9, 2017

This is what I have exactly. I have the red wire to one side of the amp meter now where do i go from it. to a switch. pos or neg side of battery. that's what has me confused. thanks norm

Bob · Nov 9, 2017

HOPEFULLY, the red wire to the ammeter is from the large output stud, NOT just the red wire in the little harness?

The alternator charging wire and ALL electrical loads go to one side of the ammeter, the other side connects to the (+) side of the battery, typically at the battery cable terminal on the starter switch or solenoid. (UNLESS you've spec0-cial-ordered a (-) ground alternator???)

If the ammeter reads backward at startup, swap the connections between the two terminal studs on the ammeter.

rvirgil_KS · Nov 9, 2017

According to diagram I have of 404, it uses a charge indicator lamp and not an ammeter. If that is the case with yours, you can use this to your advantage.

Connect red wire from your 2 pin plug to output of alternator. Also connect BAT wire from old generator regulator to this output post.

Connect wire from GEN or ARM on old regulator to white wire. Remove or tape off wire from Armature on generator.

This will be same configuration as the picture diagram shown, with the existing indicator lamp replacing the diode. Without this component in the circuit, the alternator can back feed to the ignition and the engine not shut down when ignition is turned off.

Hooking up an Alternator

pinball

Well-known Member

Bob

Well-known Member

Fatamus

Member

pinball

Well-known Member

Bob

Well-known Member

rvirgil_KS

Well-known Member

Similar threads