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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2010 Posts: 291 Shop Shark | | Shop Shark Joined: Dec 2010 Posts: 291 | Ok. So I am gonna install a 3 wire 12Si on my chevy 235. It is internaly regulated. Do I need to remove to black box (old external Regulator) on the fire wall?
If so How would I go about this. Any tips would be great.
Thanks Folks | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | I converted my '38 to a one wire 6v alternator. I left my old voltage regulator in the firewall for aesthetic reasons. I moved the heavy wire that ran from the generator to the 'gen' tab on the regulator to the 'bat' tab. That way the ammeter displays correctly but the mechanical regulator isn't in the loop. I don't know which wire on a 3 wire feeds back to the battery but you could connect it to the 'bat' tab & leave your old regulator if you so desire.
Last edited by Tiny; 05/16/2012 12:27 AM.
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| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy GrandpasTruck, you don't "have" to remove the regulator, but you will have to deal with the wiring that is attached to it. Depending on how you want to wire the alternator into the truck, you can repurpose some of that wiring, hope that helps. | | | | | Joined: Dec 2010 Posts: 291 Shop Shark | | Shop Shark Joined: Dec 2010 Posts: 291 | Ok. thanks guys. I found what I needed on a google search and from your help. Thanks a lot folks | | | | | Joined: Oct 2007 Posts: 725 Shop Shark | | Shop Shark Joined: Oct 2007 Posts: 725 | Hey GrandpasTruck, see http://s1109.photobucket.com/albums...uff/?action=view¤t=alt158a.jpg for how I do it. When you think in terms of new wiring instead of patching into an old system it seems easier. Never scrimp on wire sizes!. Also, feel free to poke around in my other 'bucket albums as well. best wishes, Les | | |
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