LJ70 not charging (1 Viewer)

[Gubbtratt1]

I've decided that the time has come to work on the charging problem of my 1987 LJ70, 12v electrical system, 2lt engine. I have no idea where to start though, I haven't found anyone with the same problem.

A few years ago the regulator broke and it charged 20 volts until it blew up a battery. It then stood in a barn for a few years before I bought it. I replaced the regulator with one I bought from Autodoc. Now it doesn't charge at all. No dash lights comes on when I turn on the ignition either. The tachometer works and I've checked that the alternator is grounded. I believe I've also checked all wires between the alternator and the regulator, as well as the main charging wire between the alternator and the batteries.

 

[Gubbtratt1]

I'm pretty sure your alternator is externally regulated (I can't remember if you mentioned it). As you seem to be pretty competent with electrical circuits (certainly more than I am), I think you could grab any external voltage regulator from a 12V Toyota from the 80s or 90s if you can find one in a scrap yard.

Yup, external regulator. I'm not sure if I mentioned it either, should be evident from the pictures of the alternator though. Scrapyard is a great idea, hopefully I have time to go visit one this week.

 

[Gubbtratt1]

Went to the local scrapyards today. First one was closed, but the second one had a regulator off a Tercel. Cost me 20€. Now I just have to fix the dash as I accidentally burnt a wire while testing and then I'll hopefully have a working charging system.

 

[Gubbtratt1]

The new regulator seems to work. I haven't started it to see if it actually charges, but the dash lights up.

Is this plus the filter light next to the glow plug light everything that should come on?

I will update the build thread with more details later. I'll also have to update the glow plug problem thread, they're doing new things now.

 

[Eurasiaoverland]

The new regulator seems to work. I haven't started it to see if it actually charges, but the dash lights up. View attachment 3866203
Is this plus the filter light next to the glow plug light everything that should come on?

I will update the build thread with more details later. I'll also have to update the glow plug problem thread, they're doing new things no

On my Hilux, there is a T BELT light, low oil level and the brake warning that come on. But I think the important thing now is that you have some lights on