drain or alternator

ericwade381 · Mar 24, 2015

Ok so thought I was good almost everything is new on this truck. Put new cables on 3g swap only get my batteries to 12.5 volts running advance said the alt I pulled off the taurus was good. Anyway drove the truck a few days then let it set yesterday started it to let it run some batteries still 12.5 let it set 24 hours batteries almost completely dead so ooo is it the drain the previous owner said it had or the alternator?

riotwarrior · Mar 24, 2015

disconnect power lead from Alt to bat after fully charged let sit 24 hrs...see if still drains...

laserjock · Mar 24, 2015

The PO said it had a drain...I don't ever remember you saying that.

Something is fundamentally broken. There is no way with a "good" alternator you should only have 12.5 volts with it running. Does it increase at all with RPM? Do what riot said because that will eliminate the alternator as the draw (I've had 3 do this on my subaru). But either the measurement is wrong or you have a serious draw (like headlights on) to give you that voltage running. Can you check that voltage while the GPs are running? You should get about 8-9 volts then.

I wish I weren't so slammed, I'd make the trip up there to try to help you sort this but it just isn't in the cards right now.

OLDBULL8 · Mar 24, 2015

You sure you didn't get the Positive and Negative mixed up ?

FoolhardyIDI · Mar 24, 2015

It is easier to watch this video than it is for me to write out how to find if you have an electrical drain. Hope it helps ya out.
https://www.youtube.com/watch?v=yFCT-YZbU5o

ericwade381 · Mar 25, 2015

Thank you guys as I'm sitting with a flat darn nail I was at 12 volts turned me heater off and I'm reading like 12.5 now. Not sure what I have going on it does seem my gauge is correct going off when I tested it myself

ericwade381 · Mar 25, 2015

Also it does not seem to go past 12.5 even on hard eccelerations

laserjock · Mar 25, 2015

What kind of "gauge" do you have?

riotwarrior · Mar 25, 2015

Are you using the stock gauge or a Multi meter to test? If you are going by the stock gauge...it's not accurate and could be faulty as well.

JM2CW

ericwade381 · Mar 25, 2015

I am going off of the stock gauge and also with a multimeter. After a long day of using the truck to mulch when we were almost done for the day the battery seems very weak but she did start. Drove it home about 40 minutes and nervous that my voltage was dropping when I got home it was down around 9 volts! If I told you guys how I did the 3G swap wiring could you let me know if I did this correctly

ericwade381 · Mar 25, 2015

How I did 3g basically after putting the alternator in place the yellow wire goes to the back of the alternator where the power wire goes I ran for the power wire from a Crown Victoria to the fender selenoid small white wire goes to its own separate small plug and the green with red tracer gets spliced together with the old existing green wire with red tracer and gets plugged back in to the clip closed by the passenger inner fender

Agnem · Mar 26, 2015

If the alternator is draining the batteries, it will be warm to hot when the rest of the engine is cool. My bet is it isn't making any juice though.

OLDBULL8 · Mar 26, 2015

Maybe this will help. Your description is not understandable.

https://www.google.com/search?q=for...tech.com%2Findex.php%3Ftopic%3D2679.0;400;350

ericwade381 · Mar 26, 2015

thank you! Basically looking at this what I did it could be wrong is the yellow wire labeled a I ran that back and put it on the output of the alternator just not sure in the picture of the diagram you sent me the yellow line that runs to the bottom of the fender selenoid?

OLDBULL8 · Mar 27, 2015

I guess I should have asked if your using an external regulator or if the 3G has the internal regulator. The pics I got off the web 1st and second show an external regulator.
!st pic here is with the internal regulator.
2nd pic is with the external regulator.

drain or alternator

ericwade381

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riotwarrior

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laserjock

Almost there...

OLDBULL8

Good Morning Ya'll.

FoolhardyIDI

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ericwade381

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ericwade381

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laserjock

Almost there...

riotwarrior

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ericwade381

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ericwade381

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Agnem

Using the Force!

OLDBULL8

Good Morning Ya'll.

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ericwade381

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OLDBULL8

Good Morning Ya'll.

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