Jump to content

charging system wont work!!


SteezySkreez

Recommended Posts

okay guys so ive gone through about 4 alternators. put a new voltage regulator in there, realized that my alternator was internally regulated so rewired to bypass the voltage regulator. still doesnt work. the charge light is always on. If i charge the battery over night it will run for a day or two if i dont have the stereo on or dont use anything electrical for the most part. If i have my lights on my battery will die within 15 minutes and my car will die as well and it will be so dead i wont even be able to jump it. I have to take it out and put it on a charger for a few hours then the car will start up again. i have replaced the battery twice aswell.

any of you guys have any idea what could be causing this problem whether its a short or whatever else it could be any suggestions would help thanks

  • Like 1
Link to comment
  • Replies 25
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

The by pass wiring is this way...

 

White/Black stripe to White/Red stripe and White to Yellow. You will also have to unplug your choke heater relay as it will be wired permanently on even with the ignition off. (failure to do so will kill the battery if sitting over a weekend) At the carburetor, join the Blue choke heater wire to the Red idle cut solenoid wire beside it. The idle cut wire becomes the new power source for the choke heater.

 

100ampAltimaaltswap029Large.jpg

  • Like 1
Link to comment

This is why I would have stuck with an external regulated alternator..

 

Looks like the ground wire could be connected better or might just be the picture.  I would get a multimeter and check the voltage coming out of the alternator when it is running and work your way back.

 

EDIT:

I know you say your charge like is always on but check to see if your getting a power draw out of something while your truck is off too.

  • Like 1
Link to comment

Check all fuses. > Check for current drain with the truck off.  >  If there is any drain, disconnect the choke heater relay (closest to firewall/passenger side.) > Check for drain again.

>Find alternative voltage for choke (idle solendoid...red wire in same loom around carb.)

 

What is your voltage reading while the truck is running?

 

Don't rely on a new alternator to charge a tired battery!

  • Like 1
Link to comment
  • 7 months later...

 Check the fuse.If the wrong fuse is installed with higher rating the failed reg charges at 16 + Volts and it will get the connections/connector at the reg and wires hot before the fuse blows.The connector and connections get loose after this happens.620s are known for reg failures.I think it should be a 10 amp fuse.Anything higher will cause troubles. I found this out the hard way,lol.

  • Like 1
Link to comment
  • 1 year later...

Wiring seems really simple, if you know what you're doing. I don't. Saved this minitruck from some people, but the alternator wires got fried. You can push start her runs great. I seriously need help though, my alternator looks just like the one shown above, and im pretty sure even on his there is a fourth wire connector on the left side. mine has 4 wires coming off the alternator and I don't have a clue where each one should go

  • Like 1
Link to comment

FB3781CF-4A41-47D0-AADD-0B346FA7EB57_zps

 

Easy...

 

The White/Red stripe is the output and is connected to an insulated terminal post

 

The Black wire is the ground. It can be attached pretty much anywhere on the case. In some instances there is a second wire going to the block for extra assurance that it is grounded.

 

The plastic plug Has two wires arranged in a T as shown.

The White/Black stripe (sometimes White/Red stripe on the 620) is the Red charge lamp in the dash that comes on with the key and goes out when the alternator is charging.

The Yellow goes to the external voltage regulator.

 

 

 

Just find these wires on your harness, repair them and connect them up.

  • Like 1
Link to comment
  • 2 weeks later...

My deepest apologies, I salvaged this truck from people who nearly destroyed it. The fuse block holds 6 fuses, they had 10, one fuse in-between each fuse. I still cannot tell if this is an internal or external regulated alternator, and all 4 wires coming from the alternator have either melted and been ripped out, if they were even connected, and gave been *replaced* (I've found wires to use, but am unsure exactly how to configure this) I thank you guys immensely for your help, I am stranded until I figure this out. This lil hustler runs awesome when you push start her!

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.