charging/low voltage problem

[charlesshen]

2 alternators and 3 batters later this charging problem still wont go away,
the afc voltage level reads 8.9 -10.4. i cant figure out why my voltage is so low.
the alternators have been tested their supposedly good and every time i take my new battery to get checked im told its good then car reads 12v for a few days doesnt break up under boost and is great and then.... back to 8-11v again and same old problem, anyone ever have this problem? can it be the one of the three wires on the plug?

 

[hvyman]

yes it could. get a volt meter and check the voltage with the car running should be around 13.8 to 14v.

 

[tlo86]

only thing i can think of is the charging wires and ground if thy arent good they wont work

 

[Mk3runner]

Same thing I'd say, grounds and cables. Keep it mind proper charging isn't just alt and batt related proper engine grounds go along with it to.

Mines a solid 14v when running. Then again I got 1 gauge welding cable for charging. But good stock sized cable works just as fine. Maybe your lacking a ground somewhere, high resistance could also be.

Idk just some random thoughts

 

[charlesshen]

im gonna try some new cables ground and positive Monday or Tuesday i could definitely need to ground engine strait to the battery

 

[Danlo]

im gonna try some new cables ground and positive Monday or Tuesday i could definitely need to ground engine strait to the battery

Do you have the Brake and the Alternator light on when the engine is running?
If so, I had the same problem about a month ago. Atlernator was acting crazy on me. I took it to the store and it was fine. But they gave me a new one still. The new alternator was doing the same thing.
I took the car to the electromechanic and he found the problem right away.

It was the 15A fuse for the ECU-IG at the J/B no 1. The fuse was not bad, but it was not making proper contac. The guy just crimped the legs of the fuse holder and done. I could not believe it.:3d_frown:
This fuse is located inside at the left kick plate. In the first row from the bottom. It is the third from left to right.
I hope this helps.
Danlo

 

[tacoma_kyle]

Is the voltage regulator built into the alternators? I think they usually are, but is that tested when the alternator is 'tested?'

 

[charlesshen]

Do you have the Brake and the Alternator light on when the engine is running?
If so, I had the same problem about a month ago. Atlernator was acting crazy on me. I took it to the store and it was fine. But they gave me a new one still. The new alternator was doing the same thing.
I took the car to the electromechanic and he found the problem right away.

It was the 15A fuse for the ECU-IG at the J/B no 1. The fuse was not bad, but it was not making proper contac. The guy just crimped the legs of the fuse holder and done. I could not believe it.:3d_frown:
This fuse is located inside at the left kick plate. In the first row from the bottom. It is the third from left to right.
I hope this helps.
Danlo

thanks ill try that i went over grounds yesterday and all were solid

 

[charlesshen]

Is the voltage regulator built into the alternators? I think they usually are, but is that tested when the alternator is 'tested?'

yes its built in and no its not properly tested i think it may be at the root of all my problems im gonna try a 14v Fitzall-220
220AMP Alternator for Imports and Domestics from power bastards anyone here ever use one of these? http://powerbastards.com/proddetail.asp?prod=Fitzall%2D220

 

[tacoma_kyle]

You think 220 amps is safe for your vehicle? Holy crap thats a lot, but....it wont draw it if you dont need it.

The power equivalent @115v is about 23 amps. Crap you can weld off that easily lol.

 

[hvyman]

stock alternator is 80amps...

 

[Steve_N]

thanks ill try that i went over grounds yesterday and all were solid

I went through the same thing & even checked the grounds just as you. Still had the problem. Come to find out It was a bad Neg. Bat cable & Bat ground. I disconected the Neg Cable & notced the cable to conector terminal was loose. A slight tug on the connector & Neg cable pulled loose. I unwraped the black cover at the Bat. connector & found tarnnished, coroded wire. I cleaned it up real good & installed new terminal connector & 4 Gauge grnd wire Battery to fender. Now I get 14+ volts, 13.5+ with all lights Etc. on.


Good Luck