F15 mshf r/r install

[panasonic]

Hello fellows. Working on installing a R/R on a friends F15 MSHF 2007. The engine has a lighting coil installed but it did not come with the R/R.

As the old guy is on a very limited budget I ordered a after market R/R from amazon at half the price of the OEM (crap on me about that later)

The picture on amazon showed the correct wiring colors as a OEM would have, two greens, a black and a red. See #1 picture attached.

When I finally got it today it has two yellows, a black, a red, and a BLUE. Five wire R/R instead of a 4 wire R/R. See #2 picture

I contacted the seller, he says that the BLUE wire is a feedback loop "sense" wire to monitor the regulators output. But is not necessary to hookup and will work fine without it....and he has sold dozens of these for F15 and F20 and has had no complains about their operation.

Anybody want to venture to guess what he says is true about the BLUE wire.

I also attached a wiring schematic of a motorcycle R/R (not this one) with a sense wire and it also says it doesn't necessarily need to be hooked up.... in the description notes. PDF attached.

My thought is to hook it up and see if it outputs 13.5 or so volts, measure the amperage it puts to the battery, if it works it works, if it don't ....send it back.
rectifier.jpgrectifier 1.jpgrect.pdf
Your thoughts...good or bad



rect.pdf

[panasonic]

rectifier diagram.JPG

[fairdeal]

I'm fuzzy on what the "sense wire" would sense - and what the r/r would do in response to that "feedback"

so seems plausible to me that it is unnecessary

[boscoe99]

I suspect that it will work and work just fine.

Most R/R's sense their output voltage within the R/R itself. If there is a long wire run from the R/R to the battery there can be somewhat of an undesirable voltage drop. The sense wire can be set up to sense voltage at the battery instead of at the R/R. In the scheme of things, with good wiring, it should not about to a hill of beans difference.

[zenoahphobic]

I would connect that blue wire with a separate wire as how it is stated in the drawing. It is to get the specific battery voltage feedback; wiring looms go here there and everywhere and as Boscoe says there maybe some voltage drop along the way resulting in the battery not being fully charged.
If it is easy you can temporarily connect this wire and see if there is actually a difference with your setup. (I hate loose wires, electrons seem to fall out the ends, my mother in law ensures all GPOs switched off are off, even if there is nothing plugged in, and insists her electricity consumption is less by doing this!).

[panasonic]

Thanks for the replies. I looked into it a bit more and it is indeed a sense wire for the R/R. I have the same setup on my motorcycle after looking at its wiring diagram.
I will run a separate wire to the battery and do a few tests to see if it makes any difference or not. Only have to go about three feet from engine to the battery.

It will make a old dude happy to be able to charge his battery while fishing and not have to drag out his battery charger each day he returns home. Manual start engine, so only fish finder, bilge pump to get some rain water out and occasionally a *****ing motor.

Thanks again.

[99yam40]

I would connect that blue wire with a separate wire as how it is stated in the drawing. It is to get the specific battery voltage feedback; wiring looms go here there and everywhere and as Boscoe says there maybe some voltage drop along the way resulting in the battery not being fully charged.
If it is easy you can temporarily connect this wire and see if there is actually a difference with your setup. (I hate loose wires, electrons seem to fall out the ends, my mother in law ensures all GPOs switched off are off, even if there is nothing plugged in, and insists her electricity consumption is less by doing this!).

what are GPOs?

[rodbolt17]

and you will find that at about 9 amps at WOT you may still drag out the charger.

[panasonic]

and you will find that at about 9 amps at WOT you may still drag out the charger.

Yes I figured as much...thanks.

[zenoahphobic]

what are GPOs?

Sorry thought you use the same term over there.
General Purpose Outlet, socket for mains power.

[zenoahphobic]

I feel much happier having a small but quality charger (CTEC) installed in my boat so that all that needs to be done is connect a power lead and forget, knowing the boat battery will be fully charged at all times.