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| Homemade DIY voltage regulator??? https://mail.slantsix.org/forum/viewtopic.php?t=66406 |
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| Author: | tattoosteve99 [ Tue Jan 11, 2022 6:51 pm ] |
| Post subject: | Homemade DIY voltage regulator??? |
Seems all these new ones are total junk. I would just as well build one. Does anyone have a schematic or have made one of these? I have checked all wires, connections and grounds. All are great now that I have upgraded everything. Still the volt reg keeps dying. Junk now if you ask me. So I’m planning to build my own, that’s easy to repair, breadboard style. |
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| Author: | DadTruck [ Tue Jan 11, 2022 7:51 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Guessing that the vehicle is the 78 D100 listed in your profile. So is that an electronic VR? If so I have had an AZ Duralast VR on the 83 D150 for 10+ years with out an issue. I also upgraded the charging system on the 68 Barracuda with a Nippondenso Alternator that uses the same external electronic VR about 4 years ago and it also has been without issue. Building your own VR is fine, but perhaps you should post the issues your are experiencing with the charging system, perhaps someone could identify what is causing the issue and suggest a remedy. |
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| Author: | tattoosteve99 [ Fri Jan 14, 2022 4:31 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: Guessing that the vehicle is the 78 D100 listed in your profile.
Yes the 78 d100 my fault. I’ve upgraded to HEI, and have put the charging system in heavy duty mode as Dan had wrote up in the HEI thread. Used a better wiring harness from the same model truck. Upgraded the ammeter to a gauge, installed fuses where needed. Ran extra grounds from the alt to the VR and etc. Upgraded lights to be on relays. Re spliced wires, the correct and probably overdone way but why not. Seems it just keeps blowing VR’s. This makes like 4 since the upgrades. I’m about to put a quarter in it and roll it down a cliff just to say I lost something!! There’s only about 1 volt drop or less in the lines. I think that pretty much covers everything. It’s my only thing I have to drive so I’m out of options
So is that an electronic VR? If so I have had an AZ Duralast VR on the 83 D150 for 10+ years with out an issue. I also upgraded the charging system on the 68 Barracuda with a Nippondenso Alternator that uses the same external electronic VR about 4 years ago and it also has been without issue. Building your own VR is fine, but perhaps you should post the issues your are experiencing with the charging system, perhaps someone could identify what is causing the issue and suggest a remedy. |
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| Author: | emsvitil [ Fri Jan 14, 2022 6:18 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Can you take one of the failed VR's apart and look at the circuit? You might just need the same circuit with heat sinks on the transistors............ |
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| Author: | SlantSixDan [ Fri Jan 14, 2022 8:20 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Throwing a pile of voltage regulators one by one at the vehicle clearly isn't going to help. Instead, figure out why they're failing. Check the alternator's field circuit draw and do the other diagnostics described in the service manual. Isolate the problem, fix it, and then you won't have the problem any more. |
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| Author: | Charrlie_S [ Sat Jan 15, 2022 3:45 am ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: Throwing a pile of voltage regulators one by one at the vehicle clearly isn't going to help. Instead, figure out why they're failing. Check the alternator's field circuit draw and do the other diagnostics described in the service manual. Isolate the problem, fix it, and then you won't have the problem any more.
Agreed on checking the field current draw. What alternator are you running? The higher the amp output of the alt, the higher the field currant draw. You also mentioned "1 volt drop in the lines". One volt drop is too much if on the field circuit. That means either too much resistance or too much current flow (or both).
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| Author: | tattoosteve99 [ Sat Jan 15, 2022 10:36 am ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: Throwing a pile of voltage regulators one by one at the vehicle clearly isn't going to help. Instead, figure out why they're failing. Check the alternator's field circuit draw and do the other diagnostics described in the service manual. Isolate the problem, fix it, and then you won't have the problem any more.
I really didn’t have this problem until either the HEI conversion or the ammeter change to voltmeter. I will start there since it makes more sense.
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| Author: | tattoosteve99 [ Sat Jan 15, 2022 10:44 am ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: Quote: Throwing a pile of voltage regulators one by one at the vehicle clearly isn't going to help. Instead, figure out why they're failing. Check the alternator's field circuit draw and do the other diagnostics described in the service manual. Isolate the problem, fix it, and then you won't have the problem any more.
Agreed on checking the field current draw. What alternator are you running? The higher the amp output of the alt, the higher the field currant draw. You also mentioned "1 volt drop in the lines". One volt drop is too much if on the field circuit. That means either too much resistance or too much current flow (or both). |
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| Author: | tattoosteve99 [ Sun Jan 16, 2022 2:16 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Got a new regulator just in case. This problem is intermediate comes and goes which is why it’s hard to figure out. Checked field circuit draw and it’s good. However I don’t have the specific tools the fsm said to use. I’m planning on putting on a known good and original alternator as the magnetic charge from the fields doesn’t go away as soon as it should but still checks out ok. The alt could be stuck in a charging state as when I had it tested yesterday it started working good again. |
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| Author: | emsvitil [ Sun Jan 16, 2022 5:52 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
You could put a fuse on the field wire at the VR to protect the VR. |
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| Author: | SlantSixDan [ Mon Jan 17, 2022 5:41 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: rebuilt alt
Very likely the problem.
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| Author: | tattoosteve99 [ Sat Jan 22, 2022 2:56 am ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: You could put a fuse on the field wire at the VR to protect the VR.
Didn’t even think about doing that. I will find one within the range and install it thanks.
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| Author: | tattoosteve99 [ Sat Jan 22, 2022 2:59 am ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Quote: Quote: rebuilt alt
Very likely the problem. |
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| Author: | tattoosteve99 [ Sat Jan 22, 2022 2:18 pm ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Just a update. So I had 2 factory alternators that tested good. I installed one and it smoothed the voltage. However it was still to high. So I changed the VR and I am now getting steady 14.69-14.79 voltage even with everything turned on and off. Rechecked the wires, grounds, connections etc. All in good order. So hopefully this will fix it. |
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| Author: | tattoosteve99 [ Fri Feb 04, 2022 12:27 am ] |
| Post subject: | Re: Homemade DIY voltage regulator??? |
Guess I’m going to have to go through all the wiring etc now. Now it just cuts out all the way down to battery voltage only (12 volts) but it comes right back. There must be some gremlin somewhere in the system that I haven’t found yet. Thinking about going to a one wire setup and just be done with it. |
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