advocate1 Posted December 7, 2011 Share Posted December 7, 2011 I am installing a new Delco type 12SI 100 amp, 3 wire alternator (Pre-1989 Style) on my 1987 Sunrader Adventure. I have seen the wiring directions for this in the past but cannot find them now. Any help/links is appreciated. Quote Link to comment Share on other sites More sharing options...
Maineah Posted December 7, 2011 Share Posted December 7, 2011 Big terminal 12 volts right to the battery with at least a #8 wire (stock Toyota wire is fine) terminal 2 to 12 volts (can be wired to the big terminal with a #14 wire) F1 to a light, one side 12 volts with the key on the other to pin F2 this is important because that is what turns the field on and off. If you are not going to use a light a 10 ohm 6 watt resistor will do again one side to a keyed on 12 volt source and the other end to terminal 1. It maybe a trick the find your light wire because the Toyota warning light is relayed if you can find it at the relay you can join in to it other wise add a light. Quote Link to comment Share on other sites More sharing options...
advocate1 Posted December 11, 2011 Author Share Posted December 11, 2011 Thanks for the reply... But I think I remember seeing a way to wire it up using wire(s) from the original plug connector so as to get the dash light to work. Any thoughts on that??? Sunrader Bob Quote Link to comment Share on other sites More sharing options...
Derek up North Posted December 11, 2011 Share Posted December 11, 2011 I hate electrics. Google doesn't seem to mind. http://www.pirate4x4...p/t-587456.html http://www.yotatech....un-down-213700/ Quote Link to comment Share on other sites More sharing options...
Maineah Posted December 11, 2011 Share Posted December 11, 2011 Thanks for the reply... But I think I remember seeing a way to wire it up using wire(s) from the original plug connector so as to get the dash light to work. Any thoughts on that??? Sunrader Bob Yeah every thing but the light is there. The light is relayed, the GM has to be series to 12 volts what happens in a GM when you turn the key on the light looks at the alt. as a path to ground and lights when the alternator starts to charge the voltage becomes positive at terminal 1 and then there is no longer a path to ground for the light and it goes out. The light or a resister has to be in line because what this does in wakes up the regulator and and it in turn energizes the field now being connected to a keyed 12 volt feed it also turns it off other wise the field would slowly kill your battery when the engine was off. Give me a bit of time and the year of your MH I think I can come up with some thing for you using a resistor and your charge relay. Quote Link to comment Share on other sites More sharing options...
Maineah Posted December 11, 2011 Share Posted December 11, 2011 OK this looks like it will work if you have a 22RE or a 6 cyl. The yellow wire can go to terminal 2 it will be fused through a 7.5 amp charge fuse the red wire can go to terminal 1 (I think it maybe a white wire with a red stripe you can't all ways believe what you read) it will be marked ign on the alt. it's fused through the 15 amp engine fuse and the big wire on the GM batt. terminal. Quote Link to comment Share on other sites More sharing options...
advocate1 Posted December 11, 2011 Author Share Posted December 11, 2011 Thank You for the links. Apparently Google doesn't like electrics either as, even after drilling down several levels, neither link seems to lead to information on installing a GM, 3 wire, (not 1 wire) 12SI (not a later 150 amp) alternator in a 1987 (not pre-1985) Toyota chassis. I hate electrics. Google doesn't seem to mind. http://www.pirate4x4...p/t-587456.html http://www.yotatech....un-down-213700/ Quote Link to comment Share on other sites More sharing options...
advocate1 Posted December 11, 2011 Author Share Posted December 11, 2011 Thanks Maineah... That looks like it will work and use the coil of the relay as the current limiter for the field exciter. I'll give it a try and report back. Sunrader Bob OK this looks like it will work if you have a 22RE or a 6 cyl. The yellow wire can go to terminal 2 it will be fused through a 7.5 amp charge fuse the red wire can go to terminal 1 (I think it maybe a white wire with a red stripe you can't all ways believe what you read) it will be marked ign on the alt. it's fused through the 15 amp engine fuse and the big wire on the GM batt. terminal. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted December 11, 2011 Share Posted December 11, 2011 Maybe you could ask "Spark Chaser Extrodinaire" who posted "... but kits, including mounting brackets and wiring looms, are available to hang a higher output GM alternator in place. Check the off-road parts sources. I helped a friend hang one on a 84 Toy 4x4 a few months back and it was a piece of cake, took less than an hour." https://groups.yahoo.com/neo/groups/toyota-campers/conversations/messages/141828 Sounds like he's done it recently and would have your answer. Quote Link to comment Share on other sites More sharing options...
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