92 Sc300 (2jzge) Alternator Installation Trouble

[hfsys]

I've got a '92 SC300 (2JZGE), that I just had to replace the Water Pump and Alternator on. I was able to tear-down the front and replace the Water Pump without too much trouble due to the really great right-ups on this site,(except for some aggravation with getting the nut off for the Harmonic Balancer. Though, when I finally followed the advise to use the Starter to get it off, it really did the trick and saved the day).

It has been over a week since I did the Water Pump, and I was going to do the Alternator at the same time I first finished it, but I was shipped the wrong one and had to send it back. Now, I finally have the correct Alternator, but the problem is that I don't know where the Wire with the Bracket attaches to, and all the instructions I have read said that their should be an Alternator Wire to attach to the top terminal, (which I can't even find this wire). The only thing I have connected right now is the obvious, which is the round connector plugged into the back of the Alternator. This can't be it though, because if I start the car and then pull the Battery cable, the car dies.

Could someone give me some insight to what I am missing, or even better yet, do that AND post a picture or two of their 2JZGE Motor and Alternator with the correct hook-ups. This is really frustrating me because it's only an Alternator. It should have been a 10-20 minute job, and has now gone on for days.

Thanks. :D

[Tomj8]

I've got a '92 SC300 (2JZGE), that I just had to replace the Water Pump and Alternator on. I was able to tear-down the front and replace the Water Pump without too much trouble due to the really great right-ups on this site,(except for some aggravation with getting the nut off for the Harmonic Balancer. Though, when I finally followed the advise to use the Starter to get it off, it really did the trick and saved the day).

It has been over a week since I did the Water Pump, and I was going to do the Alternator at the same time I first finished it, but I was shipped the wrong one and had to send it back. Now, I finally have the correct Alternator, but the problem is that I don't know where the Wire with the Bracket attaches to, and all the instructions I have read said that their should be an Alternator Wire to attach to the top terminal, (which I can't even find this wire). The only thing I have connected right now is the obvious, which is the round connector plugged into the back of the Alternator. This can't be it though, because if I start the car and then pull the Battery cable, the car dies.

Could someone give me some insight to what I am missing, or even better yet, do that AND post a picture or two of their 2JZGE Motor and Alternator with the correct hook-ups. This is really frustrating me because it's only an Alternator. It should have been a 10-20 minute job, and has now gone on for days.

Thanks. :D

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I think you'll find removing the battery from the circuit kills the engine even with a known good alternator. Removing the battery interrupts the path to ground for everything normally connected to the positive battery terminal, i.e., you'd be breaking the circuit. One of those items losing it's path (through the battery) to ground is the alternator itself, so it couldn't supply the power to run the engine without the battery intact. I could be wrong, but I've never seen an engine running with no battery in the circuit and looking at it on paper I don't see how it could happen. I doubt that's a good test of whether the alternator is properly connected. Why not just note whether the charge light goes off with the alternator hooked up (and the battery in the circuit as normal) when the engine is running?

[hfsys]

Actually, you only need the Battery to start the car. As long as the Alternator is connected properly, it will generate the power for the engine as well as charge the battery. The circuit is completed through the Alternator being connected to the engine, which is connected to the body of the car.

I've know someone that didn't have a battery for whatever reason. Every place he went, he would have someone give him a jump to start the car. Then once it was started he would go where he needed to go, just running off the Alternator.

[old_s13]

dont plug and unplug the battery while the car is running, you risk doing serious damage to numerous electrical/computer components on your SC. ever heard of voltage spikes? not a good thing.

there is a heavy gauge wire that goes from the alt to the bat, its typically around 8-10ga and secures the ring terminal with a nut. careful, this lead is directly connected to the battery, disconnect your battery when working with this lead.