superchargeddrt
Well-Known Member
I do have a oscilloscope (a nice Tektronics DPO scope). That is where I will go to loo, for The AC ripple. If I see any I will definitely swap alternators
If all the diodes are "there", you'll see a tiny bit of ripple, but fairly smooth.I do have a oscilloscope (a nice Tektronics DPO scope). That is where I will go to loo, for The AC ripple. If I see any I will definitely swap alternators
Is this a standard Mopar system alternator and regulator? If not, know that some systems look for a bit of 'juice' out of the alternator before starting the regulator. Revving the alternator does this.When I start the car sometimes, the voltmeter will read about 12V. If I rev the engine it will jump up to 14V at idle and stay. Took the alternator to the local parts store to have it tested
Two stores tested it good,one said it didn't put out the proper voltage but the diodes tested good. Watched a video which stated that the alternator should be grounded to the voltage regulator if it's external.
Do you have a part number & a picture of the adjustable reg you used. I have a 68 Dart with the same issue,read all the posts tried everything. I changed to 70 Alt and VR, Mad conversion, put a 68 Barracuda dash in with volt meter, went through the harness cleaned all connections, found no issues. really frustrated!!!!Okay, so I replaced my mechanical VR with a electronic when I did the Mad conversion and headlight relay mod. I ungrounded the one field connection to the alternator (always had a 2 field connection alternator) and bought the new style regulator from Advance Auto and mounted it with star washers and also ran new wiring to it. Not long after that I noticed a flicker in all of the lights as well as the voltage gauge. I checked.the difference in ground potential by measuring (with the engine running) from the engine block (my battery is in the trunk) to the regulator and only measured a difference of 0.1 Volts. To be safe I ran a ground wire directly from the alternator to the regulator, no change.. I checked the voltage with my Fluke meter and found it was 15.7 Volts!!!! Not Good. I did some checking online and found out that that voltage regulator that Advance Auto sells, a lot of people are having trouble with it and it appears to be due to the fact that you can't get a good ground on it through the anodized coating. I then went and ordered anot her brand new regulator from Napa Auto Parts for $35. I installed it with the same results. I then ordered and adjustable regulator online (Ebay) and was able to set the voltage to 14.2 volts and the lights are no longer flickering. By the way, it only cost me $20 with free delivery. Hope that this helps everybody else
Do you have a part number & a picture of the adjustable reg you used. I have a 68 Dart with the same issue,read all the posts tried everything. I changed to 70 Alt and VR, Mad conversion, put a 68 Barracuda dash in with volt meter, went through the harness cleaned all connections, found no issues. really frustrated!!!!
Well I fixed the flicker by adding a relay to feed the voltage regulator. I fed the regulator from the starter relay. Now the voltage gauge goes to 14 volts and stays there rock solid. The lights are bright and there is no flicker.
Uh, after 46 years it's probably a good idea to get rid of some of the BAD ideas that the mfg'ers had for the new stuff. Ammeters were a bad idea fro the start. JMHO .
I most certainly am! Thanks for all of your great ideas and help, it was greatly appreciated.Abso-lutely frickin GREAT!!! Bet you are happy
Okay Guys,
Here is how I fixed the flickering lights/voltage issues using a common relay that is typically used for driving lights. Hope that this helps.View attachment 1714953199
Okay Guys,
Here is how I fixed the flickering lights/voltage issues using a common relay that is typically used for driving lights. Hope that this helps.View attachment 1714953199
So you added a relay as well as the adjustable VR?Okay Guys,
Here is how I fixed the flickering lights/voltage issues using a common relay that is typically used for driving lights. Hope that this helps.View attachment 1714953199
No I am only running one regulator, the adjustable one I bought from Road Runner Electronics. I should have said that I replaced the nonadjustable regulator with a adjustable.I am a little confused now... do you run 2 VRs ?? Why.. ?
Greetings Juergen