help plz. electrical issues. no charging. new engine wiring harness

[jd02ram1500]

hello I have a 69 coronet 383 no ac electronic ignition. just recently replaced the old wore out engine wiring harness and installed a new one. well now It wont take a charge. changed alternator and voltage reg. checked behind alternator and its not getting power. it is a three prong type. im young dumb and confused. i have an a body guy helping and were stuck.

 

[Hemi Rebel]

3 prong type? I guess you mean it has 2 field terminals. If you have a 69 harness, it will have only 1 field terminal connector coming from the regulator. Connect that to the terminal closest to the battery wire stud. The other field terminal should be in the 12 o clock position. This terminal should be grounded to the alternator case. Provided you have power from the ignition switch through the regulator and then to the alternator, you should have a functioning charging system.

 

[jd02ram1500]

Ahhhh duh 2 prong and the ground that ya bolt on. thanks will def check it out and ill let ya know how i make out

 

[440roadrunner]

3 prong type? I guess you mean it has 2 field terminals. If you have a 69 harness, it will have only 1 field terminal connector coming from the regulator. Connect that to the terminal closest to the battery wire stud. The other field terminal should be in the 12 o clock position. This terminal should be grounded to the alternator case. Provided you have power from the ignition switch through the regulator and then to the alternator, you should have a functioning charging system.

This is correct, but you seem to imply? that it matters which one you ground, and it does not. The easy way to ground one field is to remove one brush holder and go find a couple or ?? washers which will replace the fiber washer under the screw. You don't want to crush the ceramic insulator. IE you want 1, 2, or 3 washers to form the approximate thickness of the fiber washer, and that will then ground the terminal.

 

[Hemi Rebel]

This is correct, but you seem to imply? that it matters which one you ground, and it does not. The easy way to ground one field is to remove one brush holder and go find a couple or ?? washers which will replace the fiber washer under the screw. You don't want to crush the ceramic insulator. IE you want 1, 2, or 3 washers to form the approximate thickness of the fiber washer, and that will then ground the terminal.

ya, there is a method to my madness. The factory single field terminal alternators grounded the top most brush to the case. I just want to avoid a situation where they grounded the other terminal and then try streching the field wire to the top terminal, depending on how much slack the new harness gives them. And, I want to keep the ground away from the battery post as much as possible. Just trying to avoid unintentional issues that may or may not come about.

 

[jd02ram1500]

Hey thanks yall. i went and did what ya told me. but still not working. as soon as i shut it off i have to jump the battery. and also if it is working correctly it should stay running if i unhook a battery cable... right? because that doesnt work either. it shuts right off theres no power going to the alternator. i grounded the top most field terminal which is 12 0clock position to the case of the alternator and connected the field terminal connector from the regulator to the terminal closest to the battery stud closest to the fender ... still stuck.. :/

 

[Hemi Rebel]

Hey thanks yall. i went and did what ya told me. but still not working. as soon as i shut it off i have to jump the battery. and also if it is working correctly it should stay running if i unhook a battery cable... right? because that doesnt work either. it shuts right off theres no power going to the alternator. i grounded the top most field terminal which is 12 0clock position to the case of the alternator and connected the field terminal connector from the regulator to the terminal closest to the battery stud closest to the fender ... still stuck.. :/

Ok, with the alternator sorted out, check for voltage on the field wire from the regulator. You have at least a test light right? You should have battery voltage from the ignition switch coming into the regulator. Check for that first. If you have that, check for regulator output. And the regulator is case ground so make sure is is mounted tight to firewall.