|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-10-2017, 04:41 PM | #1 |
Senior Member
Join Date: May 2010
Location: NorCal
Posts: 2,617
|
Alternator question
Guys
I have a GM 10 SI alternator that came on a 56 Ford I bought. But it was not hooked up. I'm posting here because there is more experience here in the Early V8 Forum for wiring assistance. OK, On the alternator there are 3 connections: A plug that has one for the charge light, and one for the excite wire (from ignition switch circuit). Then a larger one that goes to the battery. My question is about the ignition switch wire and the size of the wire. The plug wires had been cut off: The one for ignition is quite a large gauge (10) and I would like to know why? If all this wire does is turn on the alternator, why is it such a big wire? I've done a bit of research & haven't got a clue. Any help is appreciated. Thanks so much Jim The reason for the question is that I'm trying to use an original type wiring harness. |
10-10-2017, 04:45 PM | #2 |
Senior Member
Join Date: May 2010
Location: Lakeland Florida
Posts: 302
|
Re: Alternator question
Someone probably had it hooked up as a one wire alt conversion or attempted to. Hook it up with your harness and you will be good to go.
|
Sponsored Links (Register now to hide all advertisements) |
|
10-10-2017, 04:53 PM | #3 |
Senior Member
Join Date: Apr 2015
Location: Sweden
Posts: 3,045
|
Re: Alternator question
You have one for charging going to battery.
Another for sensing the voltage for you system going to the fuseblock or some other central part of your wiring not being switched. Then you charging light cable being the only one needing a switched connection or the light will be constantly on engine not running.. |
10-10-2017, 04:54 PM | #4 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
Re: Alternator question
The best GM alternator to run is the true 1 wire self exiting version. A true 1 wire,no regulator,reasonably priced and cleans up the wiring. They also usually have higher amp ratings then the earlier 3 wire also. Then you may run a voltmeter.
|
10-10-2017, 05:05 PM | #5 |
Senior Member
Join Date: May 2010
Location: NorCal
Posts: 2,617
|
Re: Alternator question
Thanks for the help.
Although it doesn't tell me why the wire is so large? I'm using an original (repro) wire harness and trying to make the alternator appear to be original (kinda). I've taken a new regulator & isolated all three terminals to create kind of a terminal block & then hook the original wires t that to create the illusion that it's all hooked up. I know, kind of dumb, but that's me Thanks Jim Hey Sid How's Idaho treating you? Best Jim Last edited by Kahuna; 10-10-2017 at 05:06 PM. Reason: added info |
10-10-2017, 05:25 PM | #6 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
Re: Alternator question
Sponsored Links (Register now to hide all advertisements)
I'm just trying to get ready for winter up here. Other then that just starting to put the Starliner together that I just painted. Take care Jim....... |
10-10-2017, 06:09 PM | #7 | |
Senior Member
Join Date: May 2010
Location: Capital of Corruption , NY
Posts: 810
|
Re: Alternator question
Quote:
|
|
10-10-2017, 06:42 PM | #8 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
|
Re: Alternator question
|
10-10-2017, 06:47 PM | #9 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
|
Re: Alternator question
I disagree with some of the wiring suggestions. The #2 terminal should connect to a NON-switched source (always hot) and as near as practical to the battery. The #1 terminal connects to a switch source via a indicator light or similar load. The BAT terminal connects to the battery. The #2 terminal is the same one you can connect directly to the BAT terminal at the alternator to eliminate the wire doing back to another source. However, this connection does not provide the remote sensing that you get with the correct setup.
As for using a dummy voltage regulator as a terminal strip, I am using the same arrangement to maintain the original look of the wiring. Some examples of wiring: Last edited by JSeery; 10-10-2017 at 06:57 PM. |
10-10-2017, 06:49 PM | #10 |
Senior Member
Join Date: Nov 2010
Location: NM
Posts: 2,438
|
Re: Alternator question
If you don't want an idiot light, you can do it as shown below. Agree on the two wires being relatively small, in fact I think they're both around 16 ga. Dorman sells a replacement plug with pigtails, http://www.autozone.com/electrical-a...600718_72832_0
__________________
'52 F-1, EAB flathead |
10-11-2017, 01:13 AM | #11 |
Senior Member
Join Date: Oct 2013
Location: Glens Falls NY
Posts: 1,267
|
Re: Alternator question
I use a #8 on the output terminal to reduce resistance in the charging line, and #16's for the sensor run and exciter/ignition switch run. If you don't use and idiot light install a 10 ohm/10 watt resistor as a substitute. To my knowledge all typical alternators have an internal regulator.
I have used 10SI and 12SI Delco alternators of 55 to 73 amp sizes and now use a one-wire 63 amp unit that functions very well. Beware of off-shore units. My experience has been that their regulators are often have short-lived and sometimes non-functional right out of the box. Your local electrical motor shop can be a good resource. |
10-11-2017, 10:36 AM | #12 |
Senior Member
Join Date: May 2010
Location: NorCal
Posts: 2,617
|
Re: Alternator question
Thanks everyone.
Jseery, the diagram & pics posted are exactly like what I have. The plug shown in the first pic is also like I have & the wires are the same in size & color. The red wire is quite large (10 or 12 guage). That was my initial question? Why such a heavy gauge wire in that position. Don't want to fry anything if using a smaller wire will create a problem I am going to use the idiot light also. In picture #2, labelled internally regulated Alternator, if I wire mine up like that will I be OK? Thanks again to all Jim |
10-11-2017, 10:45 AM | #13 |
Senior Member
Join Date: May 2010
Location: NorCal
Posts: 2,617
|
Re: Alternator question
I again want to thank everyone for their input & help.
I think I finally have it clear in my head now JSeery & Ross F 1 thanks so much for the pictures, VERY helpful Regards Jim |
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|