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#1 |
Registered User
Join Date: Aug 2018
Location: port colborne
Posts: 33
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voltage reg problem
GOOD DAY ALL
i have spent the day going thru a ton of posts on Voltage Regulators and i cant seem to find anything that covers my specific problem. hoping someone here will set me on the correct path electrically (pardon the pun) 1972 c10 SBC 350 3 wire alternator w external Voltage Reg no A/C no pwr win, stock radio details low charging voltage @ bat when go thru stock reg -by pass reg (test) alternator pitting around 14.9 15.4v i believe this test confirms the alt is okay? so i suspect the VR so went online Napa Canada out in my vehicle details and was directed to purchase VR142SB as exact fit for my truck, so i ordered it. when i got it a became perplexed i thought it would be a matter of plug and play .."as in EXACT FIT" but it doesn't look like it to me see pics any ideas? thanks Mac Last edited by MacataQ; Yesterday at 09:13 PM. Reason: add pic |
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#2 | |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,235
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Re: voltage reg problem
Quote:
It looks like a slight design change. The contact on the left [in both pix] goes thru a heat dissapating resister to ground on the box itself. In the newer version, there's a terminal for you to attach your own ground lead. The Factory also had the VR boxes suspended off the Radiator Core Wall with vibration shedding rubber mounts. I have duplicated this effect by stacking rubber plumbers' washers and this may isolate the VR Box from ground, so groundibg is necessary. To be honest, I had trouble with ''Lifetime Warranty'' replacement parts from O'Reilly's. They bought out Checker Auto and inherited their lifetime warranties, but their replacemts all failed. On my '68 Chevy Stepside, I cannibalized a VR that was on my '67 K/10 Suburban, from 1998. It works fine. On my '71 GMC Jimmy, I got a wiring conversion kit from M&H, and Got a NIB SI-12 Alternator with internal VR. It's working fine.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; Yesterday at 11:38 PM. |
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#3 |
Registered User
Join Date: Aug 2018
Location: port colborne
Posts: 33
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Re: voltage reg problem
orange
thanks for responding it looks like it lines up correctly the new one does not have aground on the casing like the old one Mac |
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#4 |
Senior Member
![]() Join Date: Jun 2022
Location: San Ramon,CA
Posts: 489
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Re: voltage reg problem
Isn't the L-shaped contact on the left spot welded to the case, or is that an optical delusion?
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1970 C10 Custom longbed 350/350 |
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#5 |
Senior Moment
![]() Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,115
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Re: voltage reg problem
I seem to remember something about polarization of a VR. Touching one of the wires to get it flowing in the right direction. "??????????
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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#6 |
Registered User
Join Date: Aug 2018
Location: port colborne
Posts: 33
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Re: voltage reg problem
70
not sure on that? any details? Mac |
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#7 |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,111
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Re: voltage reg problem
following
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#8 |
Senior Moment
![]() Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,115
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Re: voltage reg problem
This was a long time ago. I remember something about touching Field to Ground. Probably long forgotten due to new Alts with built in Reg ?????
Any body old enough to remember this or am I Dreaming. LOL I’m only 70 and I think my mind still works OK. ????
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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