OUTFXD Posted April 11, 2023 Report Share Posted April 11, 2023 Got my new alternator. Installed it, that was an adventure! Got evertthing back together aaaand, no joy. Ran a test on the alternator and it was putting out 10v. Wire on the back to the Bat wire on my voltage regulator... I cant help but notice that there is no output to charge the battery. What did I miss? Help! I miss driving my car! Quote Link to comment Share on other sites More sharing options...
Los_Control Posted April 11, 2023 Report Share Posted April 11, 2023 You missed pictures of what alternator you have. 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 https://www.ebay.com/itm/234736065907 Quote Link to comment Share on other sites More sharing options...
Saskwatch Posted April 12, 2023 Report Share Posted April 12, 2023 I’m studying the picture of Sam Buchanan’s engine bay & I’m also sure I read where you no longer need the voltage regulator when you have this alternator…… there was a post not that long ago about the proper alternator installation wiring but just can’t find it….. you are almost there my friend!? 1 Quote Link to comment Share on other sites More sharing options...
Saskwatch Posted April 12, 2023 Report Share Posted April 12, 2023 Just scroll down a few topics, on the first page , -“ 38plymouths “post on Altenator installation, January 31 , I think your answer is there ? 2 Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted April 12, 2023 Report Share Posted April 12, 2023 (edited) 15 hours ago, OUTFXD said: Got my new alternator. Installed it, that was an adventure! Got evertthing back together aaaand, no joy. Ran a test on the alternator and it was putting out 10v. Wire on the back to the Bat wire on my voltage regulator... I cant help but notice that there is no output to charge the battery. What did I miss? Help! I miss driving my car! Looks like the alternator is working fine so you have a wiring problem. You need to use a multimeter to start at the connection where you attached the alternator to the BAT lead to verify voltage then start working downstream to find an open connection. I don't know if it would make any difference but disconnect the A and F wires from the regulator. You do have a wiring diagram, right? Use it to trace the paths from the alternator to the battery verifying voltage as you go. YOu should see about 7.5v with the alternator running. I don't understand your 10v reading....how did you test the alternator?? Edited April 12, 2023 by Sam Buchanan 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 44 minutes ago, Sam Buchanan said: I don't know if it would make any difference but disconnect the A and F wires from the regulator. Already done, The arm and the fld wires ran to the generator, With the generator removed they where just loose so I removed them. 46 minutes ago, Sam Buchanan said: I don't understand your 10v reading....how did you test the alternator?? Multimeter, One lead on ground the other on the power terminal on the new alternator. Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted April 12, 2023 Report Share Posted April 12, 2023 4 minutes ago, OUTFXD said: Already done, The arm and the fld wires ran to the generator, With the generator removed they where just loose so I removed them. Multimeter, One lead on ground the other on the power terminal on the new alternator. I don't know exactly how the alternator's voltage regulator works, but that may be a normal reading if it can't "see" battery voltage. 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 (edited) Looks like I have some fresh wires to run. Quick question. With the wiring set up as in the picture below, How does the voltage regulator work? It seems like the voltage regulator is just a convenient point to Jump all the wires together. Edited April 12, 2023 by OUTFXD Wrong pic LOL Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 12, 2023 Report Share Posted April 12, 2023 on your very picture is the note to use the regulator for a common connection point or replace with a junction block...regulator is not used, just a convenient connection point 1 Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted April 12, 2023 Report Share Posted April 12, 2023 55 minutes ago, OUTFXD said: Looks like I have some fresh wires to run. Quick question. With the wiring set up as in the picture below, How does the voltage regulator work? It seems like the voltage regulator is just a convenient point to Jump all the wires together. Your new alternator has an internal voltage regulator, that is the beauty of the one-wire system, no external regulator needed. Follow Plymouthy's advice, either use the old terminal as a junction point or tie the wires together and toss the regulator. That is why you don't see a regulator in my installation, just a fuse between the car's BAT wire and the alternator's output. 1 Quote Link to comment Share on other sites More sharing options...
LazyK Posted April 12, 2023 Report Share Posted April 12, 2023 (edited) Confused You said the output measured 10 volts. The link you provided is for a 6 volt positive ground alternator. Edited April 12, 2023 by LazyK 1 Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 12, 2023 Report Share Posted April 12, 2023 I read that also but as I have no idea of the tester quality and accuracy, could be anything on an uncalibrated meter and left it at that. 1 Quote Link to comment Share on other sites More sharing options...
Booger Posted April 12, 2023 Report Share Posted April 12, 2023 16 hours ago, OUTFXD said: https://www.ebay.com/itm/234736065907 wow 100 amps. Woulnt 60 do the job? (or does it matter?) 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 53 minutes ago, LazyK said: Confused You said the output measured 10 volts. The link you provided is for a 6 volt positive ground alternator. Same here. I bought a 6v pos ground alternator and thats what it says on all the literature. Only thing I can think of is without load to tell the regulator to knock it off, the alternator is just running at full swing. 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 12 minutes ago, Booger said: wow 100 amps. Woulnt 60 do the job? (or does it matter? It was close enough to 60amps It made no nevermind to me. And I plan on towing a Teardrop trailer and was advised I would be better off with a high output alternator. Also (I dont know if this is relative to the automotive world) I know a computer power source is most efficient, and there for happier and more long lived, at about 50% load. Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted April 12, 2023 Report Share Posted April 12, 2023 16 minutes ago, Booger said: wow 100 amps. Woulnt 60 do the job? (or does it matter?) It doesn't matter. The alternator will only supply the amount of current needed to keep the battery charged. 100a would only be needed if there were very heavy loads (large electric fan, AC, emergency lights, flux capacitor...???). 1 1 Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 2 minutes ago, Sam Buchanan said: 100a would only be needed if there were very heavy loads (large electric fan, AC, emergency lights, flux capacitor...???). We need to get this car to 88 miles per hour! Looks like I messed up on the wiring. and of course its snowing. I might get to straightening the wiring out this evening. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 12, 2023 Report Share Posted April 12, 2023 snow..........that's a four letter word...!! 1 Quote Link to comment Share on other sites More sharing options...
Sniper Posted April 12, 2023 Report Share Posted April 12, 2023 3 hours ago, Sam Buchanan said: I don't know exactly how the alternator's voltage regulator works, but that may be a normal reading if it can't "see" battery voltage. Alternators do not put out anything if they can't see battery voltage. You need the battery to excite the field (Technically, the field coil electromagnet) windings in order for an alternator to output, that's how the regulator controls the output, btw. Quote Link to comment Share on other sites More sharing options...
OUTFXD Posted April 12, 2023 Author Report Share Posted April 12, 2023 Sun came out so I decided to play a bit. Moved some wires around, got 6.9v. Nice but not quite there. Checked the wires again, Put new Terminal ends on a couple. She didnt want to fire up and my battery was half dead. Put the jumpers on and cranked. It took a minute, I went to full choke as it was... chilly out. She coughed and fired, Didnt want to run for the stereo typical flathead 10-15 seconds. Then she leveled out and purred. I pulled the jumpers and put the multipul digit reader on. SEVEN POINT THREE VOLTS! Jordan fades back! He jumps! WOOSH! Its a three pointer and THATS THE GAME! 3 Quote Link to comment Share on other sites More sharing options...
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