Pic. request: S4 Alternator wire (Terminals: R & L)
08-11-11, 12:44 PM
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Pic. request: S4 Alternator wire (Terminals: R & L)
I just need to be sure I have the right wire. It plugs into the back of the alternator. Is the plug white? And are there only two wires going to it? (black/white and brown/white)
08-11-11, 01:11 PM
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The S4 plug that you have labeled in the picture... Is the actual plug white? Or is it Black?
I have a white plug in the engine bay that has two wires to it. (black/white on the R terminal and brown/white on the L terminal.)
I also have a black plug in the engine bay that has three wires to it. (black/white and white/black are to the R terminal, and the L terminal wire is black/red. It is a thinner wire.)
Both plugs are exactly the same, except that one is white and one is black.
I have a white plug in the engine bay that has two wires to it. (black/white on the R terminal and brown/white on the L terminal.)
I also have a black plug in the engine bay that has three wires to it. (black/white and white/black are to the R terminal, and the L terminal wire is black/red. It is a thinner wire.)
Both plugs are exactly the same, except that one is white and one is black.
08-11-11, 01:36 PM
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I do not have a plug that has two wires (B/W and W/B) That plug has three wires to a two prong black plug.
I have a white plug that is Black/white and brown/white. Does this seem like the correct wire?
08-11-11, 01:41 PM
#6
The plug is White for at least an early S4. Are you sure it's not White w/brown markings and not a stripe. When "connected" to the terminal the W/? wire will have 1 to 3 volts w/key to on. To test this wire w/the plug connected you need to stick a paper clip into the back of the plug to read the voltage from the W/? wire.
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08-11-11, 02:25 PM
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Okay. The white connector was for the Air Bypass Solenoid Valve. It was actually B/W and BrY. In the FSM the the Port Air Solenoid Valve shows B/W above B/R (Black/Red ??) That may explain the two Black/White wires up top and the smaller Black/Red wire on bottom on the black connector. There is a similar green connector, with two wires going to it. Brown with black markings and black with brown markings. I don't think that is the correct connector, though. I forgot to mention, this is a S4 N/A harness.
Does anyone have a picture of this wire?
Not *wire*... I mean connector and wires.
Does anyone have a picture of this wire?
Not *wire*... I mean connector and wires.
08-11-11, 02:26 PM
#10
The S4 plug that you have labeled in the picture... Is the actual plug white? Or is it Black?
I have a white plug in the engine bay that has two wires to it. (black/white on the R terminal and brown/white on the L terminal.)
I also have a black plug in the engine bay that has three wires to it. (black/white and white/black are to the R terminal, and the L terminal wire is black/red. It is a thinner wire.)
Both plugs are exactly the same, except that one is white and one is black.
I have a white plug in the engine bay that has two wires to it. (black/white on the R terminal and brown/white on the L terminal.)
I also have a black plug in the engine bay that has three wires to it. (black/white and white/black are to the R terminal, and the L terminal wire is black/red. It is a thinner wire.)
Both plugs are exactly the same, except that one is white and one is black.
im just providing the photo, I dont know what your looking at in your engine bay
08-11-11, 03:17 PM
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Alright. This connector is non-existent in my engine bay... I peeled back a lot of tape to get to the emissions harness. I found a white wire with a thin black line. I assume this is one of the two wires that I need. The next would be a black wire with a white stripe. These wires are both the same gauge?
I am just going to tap into the harness and use an old connector. I cannot find this connector anywhere. I'm not sure how my car worked properly without it connected.
I am just going to tap into the harness and use an old connector. I cannot find this connector anywhere. I'm not sure how my car worked properly without it connected.
08-11-11, 03:24 PM
#13
The B/W wire initailly comes from the Engine fuse, but this is for an S4 alternator. S4 has a "T shaped plug" that goes on the back while an S5 is a side by side connection on the back of the alternator (refer to diagram supplied in a previous post). Is your alternator an S4 or S5?
08-11-11, 03:28 PM
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I know this. I have S4 and S5 alternators... I am installing the 130A Taurus alternator. I just needed to find these wires to modify/customize a plug.
08-11-11, 04:12 PM
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"There are two other plugs on the Taurus alt, a single wire and a three wire. The single wire connects to the middle pin on the three wire, labeled "S". The two remaining wires are "A" (Yellow/White) and "I" (Green/Red). "A" Needs to be wired into constant power (I wired the original alt power wire to this, and "I" Goes to switched power, Black/White wire on the stock S4 alt harness."
This was on the recently archived 130A Taurus alternator install.
http://https://www.rx7club.com/showthread.php?t=963777
This was on the recently archived 130A Taurus alternator install.
http://https://www.rx7club.com/showthread.php?t=963777
08-11-11, 10:29 PM
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So, I wired this up the way I thought I should. I accidentally touched terminal "B" on the alternator with a piece of metal to the engine bay and blew the 80A main fuse. Lots of sparks! :-/ Tomorrow I will replace the fuse and finally get to start the car up.
08-12-11, 10:11 AM
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Installed new 80A fuse today. Had to jump the car... Battery was sitting around 11.2~V. (Newer Optima red top.) Anyway, car started right up and drove great... But the voltage sat righat around 11.2V-11.4V idle and cruising. Think I need to charge the battery? I think I may have something wired wrong. :-/
08-12-11, 05:38 PM
#22
Rotary Freak
Does your Tarus alt connectors look like the ones in the jpg attached?
BATT is self explanitory.
S jumpers over to the "S" in the three pin plug.
"I" would get connected to the WHITE/black wire on the stk series four harness plug. NOT to the BLACK/white wire in the same stk alt plug.
"A" would go to a constant source of batt power. In your series four car that means you should run a wire from say the EGI fuse in the engine bay fuse box to that "A" terminal. Those fuses in the engine bay are hot 24/7 and that's what your looking for.
Your stk alt wire that is BLACK/White would be unused. That wire is Switched power and not to be used.
I think BUMPSTART has posted wiring diagrams for this type alt somewhere online.
Does you install match what I just wrote?
OR take the alt to a PepBoys/whoever shop and have them test it for free. Never done that myself. Too lazy.
The jpg attached I stole off the internet using a Google search for Tarus alternator wiring.
Never done this myself.
One thing I noticed about the jpg attached and the words written by that fellow. He make note that the "I" terminal wiring goes through a 500 ohm resistor on stk TArus cars wiring. That is similar to the stk series four cars wiring. The White/Black wire on stk series four cars is connected to the coil of the ALT RELAY in the CPU of series four cars and that relays coil value is.................approx 500 ohms. It's used on series four cars to EXCITE the alternator so it'll get up and going.
Out of curiosity...........start your present configuration motor up. Quickly rev to five grand and let it go back to idle. Did the alt not start outputting???? If so.......there's a reason.
The stk series four WHITE/BLACK wire is fed via the alt relay in the CPU and it in turn is fed by the METER fuse if memory serves. Might check to see if the WHTIE/black wire has power with the key to ON only. I think your losing the Excitation signal from the white/black wire.
BATT is self explanitory.
S jumpers over to the "S" in the three pin plug.
"I" would get connected to the WHITE/black wire on the stk series four harness plug. NOT to the BLACK/white wire in the same stk alt plug.
"A" would go to a constant source of batt power. In your series four car that means you should run a wire from say the EGI fuse in the engine bay fuse box to that "A" terminal. Those fuses in the engine bay are hot 24/7 and that's what your looking for.
Your stk alt wire that is BLACK/White would be unused. That wire is Switched power and not to be used.
I think BUMPSTART has posted wiring diagrams for this type alt somewhere online.
Does you install match what I just wrote?
OR take the alt to a PepBoys/whoever shop and have them test it for free. Never done that myself. Too lazy.
The jpg attached I stole off the internet using a Google search for Tarus alternator wiring.
Never done this myself.
One thing I noticed about the jpg attached and the words written by that fellow. He make note that the "I" terminal wiring goes through a 500 ohm resistor on stk TArus cars wiring. That is similar to the stk series four cars wiring. The White/Black wire on stk series four cars is connected to the coil of the ALT RELAY in the CPU of series four cars and that relays coil value is.................approx 500 ohms. It's used on series four cars to EXCITE the alternator so it'll get up and going.
Out of curiosity...........start your present configuration motor up. Quickly rev to five grand and let it go back to idle. Did the alt not start outputting???? If so.......there's a reason.
The stk series four WHITE/BLACK wire is fed via the alt relay in the CPU and it in turn is fed by the METER fuse if memory serves. Might check to see if the WHTIE/black wire has power with the key to ON only. I think your losing the Excitation signal from the white/black wire.
08-13-11, 12:01 PM
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Thanks to Akagis_white_comet I got it properly wired. His diagram could not have been easier.
https://www.rx7club.com/showthread.p...rus+Alternator
https://www.rx7club.com/showthread.p...rus+Alternator
08-13-11, 12:22 PM
#24
Rotary Freak
I'd have put a five hundred ohm resistor in line with the wire going to the "I" terminal as suggested in the link I put up in my last post and also in the post on that other thread where BUMPSTART pasted a picture of how to install a 3G alternator.
No, come to think of it while typing, I guess I would not have done that. I'd have used the WHITE/black wire just below the wire you used (you used the BLACK/white wire in the S4 alt plug).......because that white/black is switch power with a five hundres ohm resistor in the form of the coil of the alt relay. That way I'd have kept my warning light cluster alt warning light working normal. You lost that function when you used the black/white wire. So did Akagi and whoever else wired it like that.
No, come to think of it while typing, I guess I would not have done that. I'd have used the WHITE/black wire just below the wire you used (you used the BLACK/white wire in the S4 alt plug).......because that white/black is switch power with a five hundres ohm resistor in the form of the coil of the alt relay. That way I'd have kept my warning light cluster alt warning light working normal. You lost that function when you used the black/white wire. So did Akagi and whoever else wired it like that.
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