Single wire alternator.. exciter wire ?

[Dvroofer]

If someone could help me out with where and how to wire in the exciter wire when installing a single wire alternator. I?m sure it may have been covered but my searches are coming up short. I will be attempting to wire in a single wire alternator to my 1991 240 lh 2.4 b230f
Thanks

 

[JohnMc]

Single wire alternators just need that single wire. Some of them use an external jumper to the exciter wire from that terminal, some do it internally.

I stuck a GM alternator on my PV, and with the wiring I was able to choose from 1, 2, or 3 wire installation. I chose 3 wire:
1) Heavy 12+ charging lead to the battery
2) Exciter wire to the Volvo charging warning bulb (maintain warning light functionality)
3) Voltage reference (typically pulled from #1, but I chose to reference the far side of the 50 year old fuse block)

 

[Dvroofer]

Single wire alternators just need that single wire. Some of them use an external jumper to the exciter wire from that terminal, some do it internally.

I stuck a GM alternator on my PV, and with the wiring I was able to choose from 1, 2, or 3 wire installation. I chose 3 wire:
1) Heavy 12+ charging lead to the battery
2) Exciter wire to the Volvo charging warning bulb (maintain warning light functionality)
3) Voltage reference (typically pulled from #1, but I chose to reference the far side of the 50 year old fuse block)

My question would be after I land my big +red wire to the alternator and ground it, What do I hook my exciter wire to. I?m under the impression it needs to be less than 12volts. Can I eliminate this wire without issues? Or do I need it functioning?
Thanks

 

[Dvroofer]

Problem solved. Scrapped that single wire idea and swapped in a 100amp unit. Will wait to get a mechmen and a d.Barton bracket system

 

[VB242]

I have a "system" relay that I installed that energizes off the blue wire that runs the coil. I have the exciter wire hooked up to that, so no idiot light functionality. Experts on here said it would cook the alternator but no problems in several years of operation. I have a digital volt meter/USB port in my row of switches to monitor output. It always runs 13.5-14.2 volts even at full load, electric fan, headlights, blower etc. I have the denso 100 amp in my 242.

 

[Dvroofer]

I have a "system" relay that I installed that energizes off the blue wire that runs the coil. I have the exciter wire hooked up to that, so no idiot light functionality. Experts on here said it would cook the alternator but no problems in several years of operation. I have a digital volt meter/USB port in my row of switches to monitor output. It always runs 13.5-14.2 volts even at full load, electric fan, headlights, blower etc. I have the denso 100 amp in my 242.

I appreciate the information. I had no issues with the 100amp unit in the past 2 days. What I was going to do was take the 200 amp unit off my Chevy truck and use it because I was in a pickle. It didn?t come to that but I did find a rubber plug on the alternator that has two connectors. I assume I would of been able to find out what wire to what connector.

I?m not 100% on what mechmen I am going to order in the future . They have different wiring configurations as in single wire /Chevy 4 wire. The unit I?m looking at is a compact 240 volt but will need a special bracket for a tension pulley. The reason for a mechmen:
I plan on ac, electric fans,extra fog lights, hids,large stereo (not stupid but large maybe 2000 watts total), 1000 watt inverter, PA system.
I have a capacitor ready to go in and an optima battery.

 

[Dvroofer]

Thanks for everyone’s help. This board has saved my ass as always