Voltage sensing wire relocation

Hahahahaha holy crap I should have known it came from a Tacomaworld guy! Thanks crom!


I found the alternator bible and found that write-up on a totally different website. Someone took that whole thing and put it on its own webpage I had no idea it came from here.

I'd like to get this project done soon and keep this thread for the relocation part alone for all the people running extra crap on a stock alt.

 

The owner of the website you linked to and Mike aka Tacozord are the same person. He's new here at TW, and making great contributions.

Glad to help.

 

Which of the wires in the plug in @tacozord 's writeup is the voltage sensing wire?

 

Here's the link to the post in my build page where I did the Big-3 upgrade along with the voltage sense wire.

https://www.tacomaworld.com/threads/boden-build-2015-dclb-4x4.362640/page-3#post-10274246

Anyway, if you look at the following picture, I point out which wire is the voltage sense wire that connects to the alternator:


This is the plug that connects to the alternator:


According to the schematic, the white wire that comes out of this plug is the voltage sense wire. So just re-route this wire to wherever you want to sense voltage. (Notice the little "S" label where the wire attaches to the alternator, which is labeled as a generator.)

There's more details in my build page at the link above. I hope this helps.

 

Yes great write up! I went thru it all and there was a lot of good info in there. Your post answers my question!

 

Bit of a bump here. I understand you want to put the voltage sensing wire where the demands are this way you get max charge.

Could I put the voltage sensing wire straight to the starting battery? So move It from sensing at the alternator to the battery?

Also, just to confirm, you take the white wire from the alternator plug and move it. So it may be a wire run from the battery to the fuse block for jnstance instead of the alternator to the fuse block.

 

Can't help you with VSW.

But another way to accomplish this, that takes less than a minute, that is completely reversible and has worked well for me for 14 months.

A Voltage Boosting Diode.

It's a diode added to a resetable 7.5A fuse that installs in place of the factory voltage sensing fuse in the engine fuse block.

Edit: A VBD is really only an option if you're running sealed AGM in both starting and secondary batteries or batteries that can take a tad higher voltage...

I can explain it here, but the folks who build them will do a far better job:
https://www.hkbelect.com/product/143-mk3-micro-blade-75a-electronic-fuse-version-2013/

And to select which model and year:
https://www.hkbelect.com/products/toyota/

 

Interesting. What were your before and after voltages?

 

Also, this says only .5-.6 v increase. For those that did relocate there vsw what was your increase? I'm sure it really depends on your draw I guess. But if the fuse only gives .5-.6 v and the draw on the system is more, than the vsw would still need to be relocated I think.

 

Before was 13.5/14.0, very rarely 14.1

Now it's 14.0-14.2/ 14.6-14.7.

The higher numbers are cold start voltages or if the batteries SOC is low.

 

That's not to shabby at all. Thanks for the heads!

 

This is incorrect. The wire still needs to be connected to the alternator. That's the point. The alternator is sensing the voltage at some location, which when low, tells the alternator to work or increase it's voltage output. Connecting the wire from the battery to the fuse block creates a short. You want to move the wire from the fuse block to some other location. For my setup, that was a positive busbar that fed the OEM fuse block as well as my Bussman RTMR.

 

So you follow the white wire from the alternator plug. Remove it from the fuse box and put it where the demands are going to be higher? So everything is the same at the alternator, just the location of where the altnerator is getting its info is different.

 

Yup!

 

Thank you! Wanted to make sure 100% before chopping wires.