I have converted my 84TA to a serpentine belt system from an 89'. The alternator plug is different than the 84's original one. What needs to be done so the 84 harness will plug into the 89 alternator?

thanx

 

I'm working on that right now.

It looks like one of the brown or gray wires off the new alternator plug goes to the wire coming out of the wiring harness (mine's white). I can't tell which wire to use on the alternator, try one then the other. Whichever one makes the voltage gauge work is the right one.

The thick red wire off the new plug can probably go to the "BAT" post on the alternator and work fine.

The remaining wire needs to go to a "switched" 12V source. It LOOKS as though you could actually tie the brown and gray wires together, if you're still carbed and still have the choke heater circuit.

Here's the wiring for the new alternator:



And for the old style, go to:

http://www.geocities.com/vtcamaro/Pi...rams/pg136.jpg

 

Im trying to troubleshoot mine, but from the schematics with the key in the on position both the wires are supposed to be reading batt voltage, the larger wire will always read batt voltage but the smaller one will only read voltage when the key is in the run position

 

I'm in the middle of the swap as we speak. Got the driver's side bracket all put together. I'm hoping to get everything done tomorrow and fire it up, so, I'll post what I did with the wiring here.

 

You'll need to hook the 84 car's white wire to the "L" (Light) terminal of the 89 alternator. The F (field) terminal of the newer alt should hook to something with hard ignition power (as opposed to ignition power that's been fed through a light bulb) such as the coil wire.

 

Well, I blew a fuseable link or something somewhere, so I didn't get the wiring done... grrr.

 

Thanx for the replies everyone! I haven't started my conversion yet, as I ended up replacing the entire factory harness since it was throughly butchered. So I'll be starting soon enough. Keep us updated...99Hawk120.

 

Just got mine running!

I sent the sense wire (it was a thick red wire on mine, far left side) directly to the BAT post on the alternator.

The middle two wires I tied together and hooked them to the wire from the old plug that headed back into the harness.

The fourth wire (far right when seated in the driver's seat) isn't used and you won't have it unless you bought a replacement plug. I just taped it up in the harness.

 

Here's my plug:



Here's the stock plug:

 

cool, thanx a lot. That's just what I needed to know!

 

Ok, I have the replacement plug for my 89' alternator. It has 1 thick wire and 2 small wires. They are all white.
The harness in the car has one thick wire and one small wire.
My question is: Can I just hook the big wire (from the factory harness) to the big wire from the replacement plug?
Then tie the 2 small wires (from the replacement plug) together and then connect them to the one small wire from the factory harness?

 

Actually, I can't answer that question, because it sounds like your car is wired differently than mine.

Mine had, with the old alternator, a thick wire coming directly from the battery that bolted to the BAT post on the alternator. There was also a single thin wire coming from the harness, which went to the two cavity "plug" that plugged into the alternator. The second wire from that plug went directly to the BAT post. So there was only ONE wire coming from the vehicle harness.