64-72 charging system wire up using GM 3 wire internally regulated alternator

okay hello I'm Chris and this is my how to wire up a three wire GM internally regulated alternator like this one this video is going to show you everything you need to know to wire this up on anything an old tractor a deer lease vehicle Jeep anything that they have a conversion kit for show you how to put this on there so the main thing you need to know about this is that this is a 12-volt system okay so if you're putting this on something you need to go through that and make sure that you convert everything you need to convert over to 12 volts another thing is that we're going to be talking about the wire size this right here charges the battery this needs to be a 10 gauge stranded wire I'm going to make a custom wiring diagram so you can screenshot okay now I'm just going to go over wire sizes and how to wire this up if you want to screenshot a diagram and talk about it okay so all these parts are grounded naturally so I'm not going to do anything with the ground side okay so we're going to do this in the color style of GM since this is a GM alternator okay that's the only wires that I know okay so the main thing we're going to connect is this battery right here we're making this water extra big that's the only thing at that big cable should be going to doesn't have to go to anything else just right there on the starter solenoid now I forgot if it's a 1 odd or 2 odd we're just going to put big cable okay that's the only thing that this is supposed to be connected to now you wonder uh I hope you understand what the junctioning block is this right here you can easily add that it would be like a junctioning terminal or terminal block or Junction block you could probably buy that anywhere and the way that the GM style is is they have a 10 gauge run here and that's what I was talking about it's very important that you use the right gauge wires you can't play around and put a an 18 gauge right here you can't play around with these wires so that's why I'm telling you what wires to use this Junction block is where this is going to go to this is the wire that charges your battery on your alternator this is also a 10 gauge now your ignition switch is going to need 12 volts from the battery to go back to the junction bunk the ignition switch is going to use another 10 gauge red wire we got the hots run okay now let's get into the alternator the number one position is a exciter wire / dummy light wire the way that this is run is it gets 12 volts on with the key and goes through a 194 dummy light I forgot to put that the only thing that you have to do - number one is to turn it on hot with the key on with the off on sends power to this terminal right here exciting the alternator this wire also goes through a 194 bulb they call the dummy light and it will turn on when you turn your key on when you crank your engine as soon as it starts charging it it interrupts that circuit and it shuts your light off so it's not going to have any power in it after it starts charging now GM cars this would be blue going to that this is an 18-gauge blue wire now you could run it blue all the way or but the way that they're run is brown 18 gauge okay so that's the way that they run it back to the dash for the dummy line okay so number one position very simple 18-gauge throw 194 dummy light throw 194 dummy light and then over to the ignition on on with the key very important you do not run this wire constant all the time it will drain your battery down you do not want you have to wire this ignition on only very important that this is on with the key and off with the key okay okay the number two position on this alternator is a voltage sensing wire all it has to do is go back to 12 volts now this is the one where people will jump it over here I don't like to do it like that I will run it back in the harness to the junction and block but it's very optional on a tractor of course you would just jump it right there but if you have you know try to keep it neat I have other videos talking about that but you can jump it here or here so we're going to use a dotted line okay so we're going to use that dotted line this is an 18-gauge okay so sorry I'm supposed to be white but just showing you that dots because it's optional where you run that okay now the last thing is the starter okay so you got 10 gauge running in and this starter wire is purple [Music] starter solenoid whatever it really is I don't know this is a 10 gauge purple wire 10 gauge purple wire going to your solenoid let's start your car okay the only terminal left is accessories we're not going to use that on this that's when you turn the key back we turn your radio on and stuff accessories and in our position that's a points ignition you would run this to the coil but we're not going to get into that sorry just in case you're wondering but real quick let's just talk about the key real fast so I'm going to take it out of this but the key the accessories is that when you turn the key back this is off when I'm talking about ignition on I'm talking about the first click and then when you start the car it sends power to s only momentarily the crank and then when it starts it goes back in the on position so the key stays in the on position and then you turn it off and then accessory just to make that a hundred percent clear because this stuff is getting old now if you're doing this in a tractor or some old kind of car or something you would you would figure out a way to mount the 194 bulb right there I just wanted to show you that and this is a universal ignition switch okay we're going to go over wiring it right now but the W light is going to work on this setup we're going to go ahead and do it like it was in the car you're going to go ahead and put your battery up and this battery cable is going to go this was the big cable we're talking about there's only one the only thing that this should be going to is the starter solenoid all right now in these systems you have a junctioning block you can use a terminal block Junction block whatever you want to call it some cars have a horn relay with a bus bar some people actually run that back there you can do whatever you want but I like to make things look like the factory made oh okay so then you use this little junctioning block okay and note that these are ten gauge wires right here okay so this is coming straight off the battery we need a 10 gauge wire to feed our junction block because this is where you would run accessories off yeah next thing we're going to hook our now this wire charges the battery charges of the system it's a 10 gauge wire it's the only thing this should be connected to this bolt right now okay now we run this back to the junction of Locke and you can kind of see what's happening now see we got straight from the battery so this is charging straight here charging the battery just want you to see how that's labeled accessories we're not going to use accessories the starter wire bolts to the back right here okay this is just a universal switch to wire our switch up you have to run 12 volts to the switch on a 10 gauge wire this needs to be a 10 gauge wire for sure okay let's go back to junctioning block got that hooked up battery to Junction block now we're going to hook up the starter wire going to the solenoid on the starter make sure you have it in the S position and not in the AR or it won't do anything okay purple wire goes back to this place on it for the starter this is our little dummy light go into the - we're going to put number one position the exciter wire / dummy light one position goes through a 194 bulb and it goes back to the key switch and it comes on with the key on with the key ignition on with the key okay there now the number two voltage sensing like I was saying you can either run it right here back to hot or you can run it to the junctioning block when we run it to the junction block now that you see the way everything's wired up the steps I went through the wire how I wired it the junctioning blog dummy lights going to work up and real quick whenever you turn this on with the key it's going to sense twelve volts to number one position exciting the alternator as soon as the alternator starts charging it's going to interrupt that circuit and shut this light off okay so if you are testing an old alternator and for some reason this light won't shut off the alternator is bad okay you need to buy you a new alternator just went through that the other day testing an old alternator light wouldn't go off but it was still charging so that alternators a cornel okay so that will happen the alternator can still be charging and not shut this light off so if it doesn't shut this light off you don't need to put a diode in there number one position comes on with the key excites the alternator when alternator starts charging it shuts this light off now if this light does not shut off it can still charge and not shut off you need to go buy another alternator because the alternator is going out and it's it's going to start giving problems I had when I was testing like that the other day the light went off and then it wouldn't go off and then it would charge at one charge so there's something in there I don't know it's beyond me but that light stays on go get you a new alternator well I hope you understand a little bit more about what's going on to run that alternator it's very simple ask me any questions thanks for watching

Channel: Chris Craft

Views: 2,307,519

Keywords: GM alterator hook up, 3 wire GM alternator, SI alternator hook up, how to, DIY, how to hook up GM alternator, chevelle, chevy, truck, alternator conversion, internally regulated, internally regulated GM alternator

Id: SC8dovHUB2I

Length: 13min 25sec (805 seconds)

Published: Wed Mar 09 2016