77 FJ40 Alternator/Wiring Question (1 Viewer)

[bj40green]

Hi,

It's not a matter of adjusting the points. To adjust the VR you have to bend the adjusting arm under the black spring.

It's not an easy job but it's doable. The easy way out is to buy a new one.

If you want to do it yourself...... look at upper photo in this pic.
The pic is a 6 wire VR. You only have the part shown in the upper photo. I have to find a better photo for this.

The adjustment is done with a running engine and needs a steady hand.

Rudi

 

[DSRTRDR]

Voltage Regulator replacement is ~25$ from Specter Offroad or Cruisercorps or rockauto.com

look at the connectors, though, to make sure it fits your truck

 

[Sundance 77 Cruiser]

So, I want to thank you all for your help!!! I think the new VR did the trick. A very special thanks to Rudi and Claudia for sticking with me. Sorry it has taken so long to post, but I have been away for a while. I got the VR from CruiserCorp, so thank you for the referral, Claudia. Now, I guess I am on to the windshield wiper motor, the dash lights and the shackle lift! Cruise on!

 

[BrodetheToad]

I just want to say how pleased I am for finding this thread. I’ve searched for days of where the voltage regulator was placed (previous owner cut the wires after upgrading to internally regulated alternator and wrapped in electrical tape) and because of this thread, my joy has been restored.

 

[BullHab]

There should not be any wires from the alternator connected to the headlights. The head lights come off a 20 amp fuse in the fuse block through a red wire to the light control switch. The tail lights also come into this switch from the fuse block through a green wire with red stripe. See attached schematic-hope this helps--
View attachment 670965View attachment 670966View attachment 670967

Great.

 

[BullHab]

Hi Sundance,

Here is a pic with the connections.
The circuit is: Turn the key to the "on" position. There should be a voltage equal to the battery voltage on the IGN terminal. This is the input for the VR. Depending on how high this voltage is the output on the "F" terminal is equal to the IGN voltage. When the battery voltage is somewhere around 14.4V (depends on the set point of your VR) the voltage on the F terminal drops to +/- 7 Volts.
So.... if there is no voltage on the F terminal check for voltage on the IGN terminal. No voltage on the IGN terminal, check the fusebox and check the ENGINE fuse. Check fuse and the contact clamps for corrosion.
View attachment 671370

Hope this helps to figure out your problem,

Rudi
View attachment 671370

Don't know where this schematic s came from but are great! Now to figure out what i need to wire in a one wire 120 amp alternator....