I have a 2006 Ford F350 6.0 Superduty with a dual alternator setup.

I feel like a moron. Long story short, the truck kept losing charge, took the alternators to Autozone, top (primary) alternator was toast, bought a new one, re-installed both alternators, and the battery light went off.

Drove the truck around for a couple weeks and yesterday morning when I went to start it up it was dead. (I think the batteries might need replacing as well, they're old) And when I went to go check it out I saw this wire:


I was pretty much dumbfound because I feel like I've never seen it before and I'm pretty good about taking things apart and remembering how to put them to together but I don't remember this wire. My first thought was since there was an eyelet on it is that I forgot to bolt it on to the alternator contact. So I checked:


Looks like that one's all set, so I check the bottom alternator:


Looks like that one is good too, so now I'm clueless.
I was thinking maybe it also gets bolted to the top alternator contact on top of the current eyelet, BUT amazingly I found a nut I set down still sitting on the shroud that will bolt the eyelet to where ever it belongs. Which leads me to believe it has its own spot.

Here's some pics of the wires label if it helps:
Reads: "3C3T 14305", "O5F","BG" like 10 times in the red part.



And finally (I know, this post is forever long) a better idea of where the wire is coming from. It looks as if it comes from of the bottom alternators harness clip:


Any ideas? I can't dig up anything online. Thanks for your time!

 

I believe that should go to the battery post clamp just like the other one from the top alternator.

 

I would second that . The only place it really can go i to the battery or to the starter.

---AutoMerged DoublePost---

I would second that . The only place it really can go is to the battery or to the starter.

 

On my 2006 Ford E350 Superduty Van with 6.0 Powerstroke - that wire is the feed to the glow plug connectors (pin 3 on the black and the green) - and should be connected to a post sticking up from the top of the primary alternator. The primary alternator is hot all the time, the secondary alternator is switched on and off by the PCM - it typically comes on after about a minute of the engine running. So if its not connected the glow plug indicator comes on but the glowplugs themselves don't. makes starting a PAIN if it starts at all. The wire in your picture is obviously intended to be there (call it wire memory) - and your upper alternator which is the system primary one does not appear to have the protruding terminal it should have to accept that wire. - DID THEY SELL YOU AN EXACT REPLACEMENT?

 

the wires that go to the alternator i have found to be white.that lead goes to the battery hot side passenger of course.

 

i also have the dual alternator set up.