 OE (I think) voltage regulators, how to test before selling |
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| fixer34 |
 Sep 13 2022, 01:50 PM
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#1
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Senior Member  Group: Members Posts: 1,303 Joined: 16-September 14 From: Chicago area Member No.: 17,908 Region Association: Upper MidWest 
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I bought the last solid state regulator Mark had hoping to solve my charging issues or at least eliminate it as the problem (can't get more than about 13v while running). I have 3 regulators that have been in the car over the years, but the last/newest one has been there for at least 20 yrs. I don't know if these are bad, good, or somewhere in between and I have no way of testing them. So no idea what they may be worth, if anything. Opinions?
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Replies(1 - 6)
| JamesM |
Sep 13 2022, 02:05 PM
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#2
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Advanced Member Group: Members Posts: 2,100 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(fixer34 @ Sep 13 2022, 11:50 AM)  I bought the last solid state regulator Mark had hoping to solve my charging issues or at least eliminate it as the problem (can't get more than about 13v while running). I have 3 regulators that have been in the car over the years, but the last/newest one has been there for at least 20 yrs. I don't know if these are bad, good, or somewhere in between and I have no way of testing them. So no idea what they may be worth, if anything. Opinions? Damn, You get 13v when running? Wish i had that! No idea on bench testing. Havent installed it yet but i picked up one of these adjustable regulators a few months ago just to see what it will do. I run AGM Odyssey batteries in all my 914s and they tend to like a little higher voltage than 914 provide stock. https://www.ebay.com/itm/291674432232?fits=...%3ABFBMnOKWh-dg |
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| emerygt350 |
Sep 13 2022, 02:36 PM
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#3
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Advanced Member Group: Members Posts: 3,016 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
I have a couple as well. Went to the hella solid state, 13.8 all day.
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| Geezer914 |
Sep 13 2022, 04:22 PM
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#4
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Geezer914 Group: Members Posts: 2,010 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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you can adjust these by bending the arm slightly. I have one that puts out 13.8 volts.
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| lesorubcheek |
Sep 13 2022, 05:41 PM
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#5
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Member Group: Members Posts: 193 Joined: 21-April 21 From: Florida Member No.: 25,463 Region Association: South East States |
Here's a kinda neat setup for testing voltage regulators. Need a variable voltage DC supply that can exceed 14V and 12V light for an indicator, or you could substitute with another load meant to handle 12V and use a meter to measure the cutoff voltage.
https://www.thesamba.com/vw/forum/album_pag...?pic_id=1245795 Dan |
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| fixer34 |
Sep 13 2022, 06:27 PM
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#6
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Senior Member Group: Members Posts: 1,303 Joined: 16-September 14 From: Chicago area Member No.: 17,908 Region Association: Upper MidWest
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QUOTE(lesorubcheek @ Sep 13 2022, 06:41 PM) Here's a kinda neat setup for testing voltage regulators. Need a variable voltage DC supply that can exceed 14V and 12V light for an indicator, or you could substitute with another load meant to handle 12V and use a meter to measure the cutoff voltage. https://www.thesamba.com/vw/forum/album_pag...?pic_id=1245795 Dan I'll have to try that on the ones I have. Will see how a 12v test lamp does, some other threads I found say the DF voltage is only 5 to 8/10v |
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| lesorubcheek |
Sep 13 2022, 06:39 PM
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#7
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Member Group: Members Posts: 193 Joined: 21-April 21 From: Florida Member No.: 25,463 Region Association: South East States |
QUOTE(fixer34 @ Sep 13 2022, 07:27 PM) I'll have to try that on the ones I have. Will see how a 12v test lamp does, some other threads I found say the DF voltage is only 5 to 8/10v It'll be interesting to hear how it works out. I've never dug into understanding charging circuitry beyond diodes in an alternator since that's about all I've ever had to repair. Dan |
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