Alternator wiring woes!!!

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   Ok, so here is the deal... I have a 53 CJ3A that I have had for 17 years.  I put a 12v SI alternator on it back then.  It has been running great for many years, until recently the red wire going to the sensing lead on the alternator came out.  I got a new connector and wired it in as it had been for all these years with the white lead from the "field" conncected over to the ceramic resistor on the firewall.  Nothing changed, except that after I cranked the jeep she won't turn off.  
If I disconnect the "field" wire the jeep will crank and turn off as it should however it is not charging as it does when the field wire is connected.  When it is disconnected my voltmeter reads 12.6 v the same as it does when the jeep is not cranked.  With the white wire connected and cranked it shows 14.6v.... but the jeep won't turn off... I didn't change a thing... ideas??????????

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Rowdyraven Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 20 July 2014 Location: NC Status: Offline Points: 3	Post Options Post Reply Quote Rowdyraven Report Post Thanks(0) Quote Reply Topic: Alternator wiring woes!!! Posted: 20 July 2014 at 4:29am
	Ok, so here is the deal... I have a 53 CJ3A that I have had for 17 years. I put a 12v SI alternator on it back then. It has been running great for many years, until recently the red wire going to the sensing lead on the alternator came out. I got a new connector and wired it in as it had been for all these years with the white lead from the "field" conncected over to the ceramic resistor on the firewall. Nothing changed, except that after I cranked the jeep she won't turn off. If I disconnect the "field" wire the jeep will crank and turn off as it should however it is not charging as it does when the field wire is connected. When it is disconnected my voltmeter reads 12.6 v the same as it does when the jeep is not cranked. With the white wire connected and cranked it shows 14.6v.... but the jeep won't turn off... I didn't change a thing... ideas??????????
	Rowdy Raven

Lee MN Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Offline Points: 4950	Post Options Post Reply Quote Lee MN Report Post Thanks(0) Quote Reply Posted: 20 July 2014 at 12:37pm
	Your "field" wire is backcharging your ignition system, you need to install a diod in the line. Obviously your old setup had one. Not a big deal, go to a starter/alt shop and they will fix you up, and not expensive. MHO, Lee
	LEE 44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History

Rowdyraven Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 20 July 2014 Location: NC Status: Offline Points: 3	Post Options Post Reply Quote Rowdyraven Report Post Thanks(0) Quote Reply Posted: 20 July 2014 at 9:11pm
	Thanks so much! I'll check with the alternator shop tomorrow. Rowdy
	Rowdy Raven

Schimms15 Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 17 Jan. 2011 Location: milwaukee, Wisc Status: Offline Points: 2953	Post Options Post Reply Quote Schimms15 Report Post Thanks(0) Quote Reply Posted: 24 July 2014 at 3:16am
	i had this with mine too. i just wired it up to the ignition switch mine has 3 terminals 1 where the hot goes in from the battery then the other 2 get hot after the key is on but they are separate so when turn off the key they both are connected to nothing, this allows me to keep the two wires from the alternator separate and lets me kill the truck without having to choke off the fuel.
	46 2a 51 truck project named Karen