FJ60 Alternator wiring

[cumminscruiser]

Well this would not be a stock wiring proble but here it goes.

I using an alternator out of a Dodge truck it's simple, three wires and uses an external regulator standard Dodge part as well. The Dodge alternator has one battery terminal and two smaller terminals that go to the regulator. I hooked all this up and it works fine. The thing is there is three wires in my FJ60 that went to the stock Toyota alternator. Would anyone know if this could work with the Dodge stuff ?

Yea Yea why a Dodge part, well its attached to the Cummins Engine thats why.

 

[djinn]

Did some searching since I'm in the same boat with my 4bt swap. Trying to reuse the wiring if feasible. If you got this figured out, you'd be my hero to post some details. I can't really find anything on the 2 wires within the green connector. Thanks!

 

[1911]

The white wire with a black stripe (in the stock alternator plug harness) is a redundant ground for the alternator; you don't need this if your alternator is grounded well. I always add an extra heavy (2 AWG or similar) cable straight from the alternator case to the same ground point as the main battery ground cable.

For an internally-regulated alternator, all you need is the Field wire (white wire w/ green stripe in the stock harness) connected to 12 volts + that is switched with ignition, to excite the alternator.

For an externally-regulated alternator, the third wire in the green plug (white wire w/ light blue stripe) goes to the voltage regulator; all it does is trigger the idiot light if voltage is too low.

HTH.

 

[djinn]

Thanks so much for the reply. Neither wire has a stripe. I took a picture of. I also only have 2 wires in the plug. The large white wire is the charge (8 awg) but the plug has two wires, another white one (smaller ~ 10-12 awg) and a really thin yellow one (~16 awg). The two wires in the plug appear to be switched off the ign. When the ign is on, both are powered. The thin yellow shows 12 vdc, but the white one shows 11.75vdc. I have an external regulator that I need to use but would like to retain the dummy light if it isn't charging. Here is the plug I have:

Thanks again and if you have any idea, I'd appreciate it!

The white wire with a black stripe (in the stock alternator plug harness) is a redundant ground for the alternator; you don't need this if your alternator is grounded well. I always add an extra heavy (2 AWG or similar) cable straight from the alternator case to the same ground point as the main battery ground cable.

For an internally-regulated alternator, all you need is the Field wire (white wire w/ green stripe in the stock harness) connected to 12 volts + that is switched with ignition, to excite the alternator.

For an externally-regulated alternator, the third wire in the green plug (white wire w/ light blue stripe) goes to the voltage regulator; all it does is trigger the idiot light if voltage is too low.

HTH.

 

[1911]

Thanks so much for the reply. Neither wire has a stripe. I took a picture of. I also only have 2 wires in the plug. The large white wire is the charge (8 awg) but the plug has two wires, another white one (smaller ~ 10-12 awg) and a really thin yellow one (~16 awg). The two wires in the plug appear to be switched off the ign. When the ign is on, both are powered. The thin yellow shows 12 vdc, but the white one shows 11.75vdc. I have an external regulator that I need to use but would like to retain the dummy light if it isn't charging. Here is the plug I have:

Thanks again and if you have any idea, I'd appreciate it!

Unfortunately for you, some previous owner has replaced the stock wiring with his own.

Try removing the plastic wire loom and see if there is some remaining factory color-coded wire upstream that he spliced into.

 

[cumminscruiser]

Cummins / Landcruider Wiring

Probably still want to know where the wires go? Ok I'll see if I can remember .

Here is my buddys buils on Mud... http://forum.ih8mud.com/expedition-builds/453887-long-overdue-rastarig-buildup.html

I think the wiring is somewhere in there as well, he talks and writes so much I don't have the attention span to look.

 

[djinn]

That's exactly how I was going to do mine. But it bypasses the cruiser alt harness for the external regulator. Your charge indicator lamp doesn't work does it? One of those plugs, think the white controls the charge lamp. just no clue how to get that to use the factory dash lamp.

 

[cumminscruiser]

Wiring

I'll look into exactly how I wiried it this weekend. It's dark when I get home so I'll check in the light.