charging problems

hornett22 · Post by **hornett22** » Mon May 02, 2005 5:47 pm

when i bought the car it had an internally regulated alt and it's an external car.replaced the alt and regulator and still no change.anyone have the schematic for the three wires that got to the three prongs on the back of the alt.my car is an 84.

Typrus · Post by **Typrus** » Mon May 02, 2005 8:42 pm

My 84 is externally regulated.

I cannot answer your question, rather, I can add one.
How, if possible, can I set in a single-wire (or otherwise high-powered) alternator in the Terc, once I get the problems figured out?

takza · Post by **takza** » Tue May 03, 2005 4:36 am

I have a schematic, but no way to post it...having gone thru a charging problem...I can say that the wiring is a lot different for the int vs ext regulator setups.

shogun · Post by **shogun** » Tue May 03, 2005 11:15 am

all of the wagons ive seen are externally regulated, behid the battery is where you can find the regulator in some caases it can be adjusted in other it must be replaced

hornett22 · Post by **hornett22** » Tue May 03, 2005 11:36 pm

replaced the regulator and the alt from napa.only charging 12.5 volts,which isn't really charging.the other one i have is internally regulated.any help is appreciated.

takza · Post by **takza** » Wed May 04, 2005 4:32 am

If they had it set up for the newer alt...maybe you should have stayed with that setup? They probably rewired it in places?

hornett22 · Post by **hornett22** » Wed May 04, 2005 11:52 pm

all the wires look fine and correct.beats the hell out of me.

takza · Post by **takza** » Thu May 05, 2005 4:27 am

I spent a week or so "diagnosing" the charging system and found that the new regulator was defective....in this case the alt was charging way too much and getting hot.

clbolt · Post by **clbolt** » Thu May 05, 2005 6:29 am

My first Tercel wagon was a freebie that the owner had abandoned in an airport parking lot (hourly parking for 3 months) after the car quit charging. I had the alternator tested, and replaced the regulator, but the problem remained. 15 minutes at the auto electric shop discovered a bad relay under the hood, so you might try swapping the relays around to see if it makes a difference.

hornett22 · Post by **hornett22** » Sat May 07, 2005 11:25 am

only relay i see is the main relay and i replaced it.this is all difficult without a service manual which i can't seem to find.i need to know what color wires go to the three prongs on the back of the alt.

hornett22 · Post by **hornett22** » Sat May 07, 2005 10:17 pm

well,replaced some wires and now it's charging.charging around 15 volts but its better than nothing.i guess i'll adjust the regulator. Typrus,i don't see why you couldn't change to a one wire.we used to do them to old toyota trucks to bypass the charge light relay.getting one to fit without bracket mods or fabrication might be an issue.

takza · Post by **takza** » Sun May 08, 2005 5:27 am

Bentley schematic for the '84..ext reg....

* shows (4) wires...

- White

- W-Light Blue

- W-Green

- W-Black

last 3 go to the regulator...new one I bought was electronic...not too much to adjust...

apparently they also used the int reg type...cause they also show a shematic for it.....