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stock regulator wiring


I'm wondering if someone can verify my alternator/regulator wiring for me. The alternator is a delco reman 10DN 55 amp..correct for external regulator. Regulator is D635 Regitar USA unit which I think is a solid state unit with a non removable cover. It has 4  connections and a spade on the back for the condenser/capacitor. Question is should my alt have 2 wires coming from the r/f terminal?  ie the dark blue field wire is present but no second wire.?? Some drawings I've looked at show a white wire from R on the alt to 2 on the regulator. My regulator is wired; F to alt (field to Field,dark blu) , 2 is jumped to power on the horn relay , 3 is small brn to firewall junction , and 4 is hooked to the condensor..the black wire has been cut and spliced to the red condenser wire. I unwrapped the wires from the regulator to the alt to see if there was a cut off wire hiding in there but nope.   I thought the condenser should be pugged into the spade on the back of the regulator....Reg terminal 3 should be juice from horn relay?? Something doesn't seem right here. I want to keep this stock so I won't be upgrading the alt set up at this point. I have read some posts talking about 3 terminal regulators because of our ammeters? This regulator was in the car when I got itand it is not an original unit..     Having said all that my car indicates correct charging at the battery and voltage drop is ok...The ammeter works but only indicates a discharge condition. Can anyone help me out verifying this??   Thanks in advance confuse



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Poncho Master!

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Some pics from the 63 I parted out.

IMG_1625.JPGIMG_1626.JPG



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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 

Mahone Bay, NS Still not old enough to need an automatic



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Wow! I can't believe you took pics of that! Amazing. Pic one seems to confirm no white wire to alt. Pic 2 shows what I think is correct at terminal 3 and I see that the brown wire is at terminal 2 going to the fire wall..I rewired mine to correspond to Impala pics I've seen and tried it. No smoke came out lol. I note now that instead of getting a charge at idle it only begins charging at a higher rpm...say 1500 which I think was normal. Also interesting that your pic shows the 4 terminal reg....I've never seen a three terminalregulator of this design/era. Thanks

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Poncho Master!

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Pontiac uses a different regulator than Chevy. If I remember correctly it has to do with Pontiac having an ammeter.

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'68 Parisienne 2+2 Convertible Matador Red (Resale Red but not for sale).



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I have read some posts supporting ammeter vs bulb differences....this makes sense to me. I wonder if the U.S. models (pontiacs) were the same?? Any ideas about which regulator for an ammeter??



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Poncho Master!

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Dont quote me but I think it is the US one you need. Heres a picture of my spare. Dixie number: NR-142T. A three terminal 



-- Edited by JC2+2 on Sunday 23rd of June 2019 05:47:34 PM

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'68 Parisienne 2+2 Convertible Matador Red (Resale Red but not for sale).



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Thankyou! I appreciate the help Cheers

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Poncho Master!

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I likely still have that one somewhere, I took a pic because I knew the external regulator and the alternator were fairly unique.

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 

Mahone Bay, NS Still not old enough to need an automatic



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The R terminal is only used with an idiot light. The R is the relay terminal that controls the lamp relay inside the voltage regulator using terminal 2. With an amp meter the relay isnt needed and on an original regulator there wouldnt be a terminal 2 because it wouldnt have a lamp relay. An aftermarket electronic regulator will have the 2 terminal, but you wouldnt have anything hooked to it. Hope this helps.
Paul

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I've ordered up a delco equivilant 3 terminal ammeter application voltage regulator#633.....HOLY what a mouth full! Rock Auto is sending me this as we speak...I have the 635 regulator in place and working. I'll report on the results if they're are any!

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An update....I installed the three terminal voltage regulator I bought.It is/was listed for 63 american pontiac applications. I hooked the capacitor to the rear terminal,F to F, red to 3 and small brown to 4.. Next morning I find my alt very warm along with the regulator(not quite so warm).Brand new battery sucked down to 11V..I figured out that this regulator does not want 12v to # 3 terminal so I removed that.Now with only two wires connected things seem better.The amp gauge shows charge as it should and the alt is charging nicely..but..the fuel gauge appears to not like it so much.Brand new sender and anally cleaned ground there lol. Through all of this I've also discovered a wrong coil installed. Internally resisted. I wondered because the car would die when warm on test drives ...so..brand new distibutor complete assly,new coil,new plug wires and new engine harness. Now, the harness in the stock 63 impala configuration comes minus the main (black) hot lead from starter to ign sw. ugh. Yes U.S. pontiacs are different. So I'm in the process of removing that wire from the old harness and putting it in the new one! The new harness is very well done...American Autowire CF40205. I think the previous owner miswired the regulator a wrecked it because I reinstalled it wired correctly this time just to see and no worky worky. I am now going to buy a new 635 version and plug that in as I do not think the 3 terminal is/was correct for these Canadian cars! I'm sure some of you will get a chuckle out of my foibles. Maybe it can help someone else. No I'm not wealthy but I want this car stock and working as it should so I don't have to worry and my sometimes lenght cruises biggrin



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Poncho Master!

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You can have my old regulator if you want it, I think I still have it and the alternator too.

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 

Mahone Bay, NS Still not old enough to need an automatic

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