If you do get into the circuit that is ignition power and there is no easy alternative. Mount a light socket for a small 199 style lamp between the alternator and the circuit. Years ago I had the issue with a boat and had nothing else handy. You're basically just hanging an alternator light in the middle of the circuit. I always meant to fix that correctly, but....never did. Mark Price Morgantown, WV 26508 1969 AMC Rambler, 4.0L, EFI, T-5 2004 Grand Cherokee Laredo, 4.7L, Quadratrac II "I realize that death is inevitable. I just don't want to be around when it happens!" ----- Original Message ----- > From: "Jim Blair" <carnuck@xxxxxxxxxxx> > To: amc-list@xxxxxxxxxxxx, fljab@xxxxxxxxxxx > Sent: Tuesday, March 15, 2011 1:25:19 PM > Subject: [AMC-list] GM 3wire Alt hookup. (was Re: AMC-list Digest, Vol 24, Issue 24) > > It's really easy. Main wire and sensor wire go to battery . Other > wire goes to light (preferably with a 10 ohm resistor, but not > necessary) or with a switched power source, but not on the same > circuit as the ignition (unless you add a diode or the car won't shut > off. Been there, scratched my head till I figured it out) > > From: Jim Boone > To: > Subject: Re: [AMC-list] AMC-list Digest, Vol 24, Issue 24 > Message-ID: > Content-Type: text/plain; charset="iso-8859-1" > > > > > > From: tom jennings > > > Yeah you really want the three wire alt - fat charging wire, one to > the dash > > light, 3rd also goes to battery to measure battery voltage. > Batteries will > > last longer. > > This is timely as I need to repair my '72 Mat SW that is not charging. > I have a GM - 3 wire I think - rebuilt alternator on the shelf and > would like to use it for the Mat; anyone have a link to how to wire it > - a schematic or similar? Don't you need to go to the parts store and > they have a specific pigtail that needs to be attached? I had > researched this some yrs back as I was going to do this to my Rambler, > but that car is "blown apart" right now and I've lost the info... > > I'm happy I finally got the title straightened out on the Mat! Getting > plates soon so I'm just gonna drive it for awhile. It's rusty but has > a strong drivetrain. I hate to see it go to the crusher... > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20110315/cb574e6a/attachment.htm> > _______________________________________________ > AMC-list mailing list > AMC-list@xxxxxxxxxxxxxxxxx > http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com