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Discussion Starter #1
Omg...
this car is really kicking my ass
I am trying to bring it back from sitting for so long..
anyways
My old alternator was weak.
My battery seems to be fine still
its at about 12 volts right now. Will start charging it again because of me starting it letting it run and so forth.

I installed a new reman alternator from autozone
checked the charging system and nothing.
so i went back with the alternator and had them check it
said it passed twice on the test
... ok

Went home and re did the main 12v volt , i just cut and re did the O connection (the one with the bolt)
triple checked everything to see everything was grounded or was running current.
12v main was reading fine
and the plug with 3 holes or wires in it seemed to all be putting out something when the ignition was on...
followed the wires to the battery and seems to be all connected..
checked the connections on the battery and seemed to be ok

started the car and chcked once again..
still no charge...
WTF!

battery light is on idk... im lost.

should i just take it out and have them check the alternator again but this time i wanna see the test....
 

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I did this exact same thing but it turned out that my belt tension wasn't tight enough even though it looked fine. Belt was spinning, pully was spinning, no squealing noises. Cranked up the tension and it started working perfectly.
 

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Discussion Starter #4
thanks for helping me out. I double checked tension and its nice and taught.
:(

I wouldve change the alternator for a newer version one like the camry upgrade but if i cant get the stock one to work i dont see the point.

Tomorrow im gonna charge up the battery to max and test it out underload via turning on headlights and such.
wish me luck
 

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Discussion Starter #6
continued to work on the car

I started it. checked it. same thing. no charge. I even turned on the headlights to try and make a load on it and no charge.

sooo I
took apart the charge relay.. looks ok to me..





idk
im charging up the battery and unplugged random things and plugged them back in.
Gonna see if it charges...
if not gonna the alternator and triple check that its fucken working and i wanna watch it this time..
If i cant figure it out this electrical car shop is gonna charge me 120 n hr to figure it out... soooooo
 

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Did you check the 7.5 amp CHARGE fuse. The wire voltages on the plug are correct.A bad charge light
relay will not let the battery charge.Had to replace mine back in the 90's.
 

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Discussion Starter #8
charged up the battery and installed evreythiung agian. still no charge..
took it all out and went to my nearest autozone and they tested both with flying colors..
GRRR this car is my worst enemy atm... other than my neighbor who opens his doors aggresively on my van.. anyways

Thanks for chimming in here.
I did check the 7.5 amp fuse and looked to be good. power is going through it.
Should I replace the charge lamp relay?
I am gonna see if someone has it in stock somewhere on the island and do it.
Maybe it shorted and is not engaging correctly..
btw my bulb is out on my check engine light but i dont think that has anyhting to do with this..
the bulb work fine for the battery and the break and coolant light.
Btw coolant light is on too.....
must be a short somewhere

If i cant find the relay should i do the diode trick?>
probably cant find that diode on the island either....
 

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Did you check the fusible links inside the plastic box near the battery terminal? The alternator runs thru those. Are all the battery connection good and not corrorded? I would use an multimeter to make sure you don't have many ohm from alternator to battery.
 

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Discussion Starter #10
ooo really.
The fusible links in my car seems to be really deteriorated.
When i opened the fuse box and pressed on it in the middle. the rubber around the wires crackd and seemed very brittle.
oo this is a good sign, I actually went to autozone yestyerday and bought universal fusible links.


I bought 2 differenct sizezs. I even bought 4 sets from toyota parts deal.com . I think they only had the yellow in stock.

But since i have the universal one im gonna take ot the old one and cut to length and install. hopefully that works!
 

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Discussion Starter #11
sooo worked on the car again...
I made a new fusible link.

i also am by passing the charge lamp relay..


my lgihts dont come on anymore but still not charging.
So that wasnt the problem...
This car is truely mad at me..

Most people say when the alternator goes out I get a brake light and battery light to come on. I had the coolant light as well. even maybe the check engine light but I cant tell for sure because the bulb on the engine light is dead
gonna take apart the cluster and change it. Maybe it will trouble shoot something...
This is so weird...

I must hav ea short some where..
 

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Discussion Starter #12 (Edited)
So far
made sure its a working alternator
made sure its a battery that is good and can handle load and can take a charge
checked and changed fusible links
checked and changed 7.5 amp fuse
Checked and by passed lamp charge relay (diode)
checked wiring on 3 wire plug (White is ground) (fat black wire always on 12v) (smaller black wire ignition 12 v)
Checked connection main bolt 12v on alternator to battery
checked alternator main bolt while car was on and still nothing
Made sure its tight and the 2 v belts are taught

I started the car and lifted off the positive terminal and instantly dies.

im kinda lost now...
is there a way to trick the alternator to just always be charging..
I know some guys do this in honda swaps..

found wiring book for our car online
Here is what i found for the charging system

Looks like the efi main relay and the ig main relay are within the charging system
So i am gonna change all those relays!

changing efi main tail and head

They look pretty crapped out anyways. Hope autozone or orelly will have them
and now you can see the fusible links i made!
 

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Discussion Starter #13
after studying the wire diagram i have found my problem.
I am getting current through one of the relay when car is off. always staying on. It shows that both should be off and both should engage when car is on.
OK
I am gonna try find relays tomorrow if not gotta order via toyota auto parts. com....
takes so long to get here...
 

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Discussion Starter #14
OK so system still not charging.. LOLOL

I replaced all relays and Fuses that are associated with the charging system.
I even check underneath the box and made sure everything looke pretty good

I really dont understand what is going on... LOLOL wow.
This car is truely hilarious!
LOL if icant figure it out its gonna go to a auto electrical shop.
 

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Disclaimer: I am no Tesla or Edison.

If you have not already done so it would be good in any event to check the main ground wires. My negative battery terminal had some resistance in it which caused some similar problems. Test the continuity between the ground ends and replace or clean them up. Wires that appear to be in good condition can corrode inside the insulation. Use your ohm meter to check the extreme ends of the suspect conductors in the concerned circuits.
 

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Have you even used a multimeter to check the voltage at the battery with it running? These cars don't put out much at idle you need to keep the RPM up around 2-3k RPM to get any kind of charging.
 

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Discussion Starter #17
toyodasup thanks man. Really appreciate it. I do not have a ophm meter cause they r a little pricey but will take it to my friends shop on the weekend where he has one.

SilverMk2
Ofcourse bro
i revved that thing to 4k! and nothing!
I even unplugged the positive terminal while it running instantly dies.. alternator is putting out shit.
I check out all the connection by using the mulitmeter by using the thing where it checks the circuit. (makes a noise)
Everything is connected

I am loosing resistance some where and its being really dumb!


But it could certainly be a ground issue!

I did check ground on altternator itself and it is grounded.. but maybe not well enough
 

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Bad ground are always difficult to diagnose anf find, simply because we always assume thdy are good.
 

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After looking at a clearer wiring diagram. The following need to be good. 15A ENGINE FUSE goes to alternator 3 pin plug (pin #2) should cycle on and off with ignition switch. Pin 3 on alternator connector constant 12v (battery).Pin 1 will show ground if charge relay coil is plugged in.When alternator plug is connected to alternator, pin 1 will have 12v sent to the charge fuse. Plug alternator plug in. Pull charge fuse with ignition on and test for power (12v is good)

Take a ground wire directly from the battery negative to alternator case.That will solve any ground issues for alternator.

Bolt on alternator should always have battery voltage.

If test voltages are not there check for broken wire. Unless the alternator has a bad rectifier.
Thats all I have for now.
 
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