HJ61 Charging troubleshooting and ideas needed

[opalbeetle]

Is there a sense wire (if this is what it is called) from the alternator to the regulator to wake it up? If there is, what colour wire is it? There are three wires coming from the plug, a green, a blue and a black.

Thanks for the help.

 

[opalbeetle]

So, after all of the wire chasing, relay checking, and head scratching, I've finally sorted out what the issue is. The alternator wasn't "talking" to the regulator, so the regulator wasn't doing what it needed to do. Reason....bad diode in the alternator. Unreal! What a learning curve!

Anyhow, thanks for all of the help and guidance from each one of you who replied and gave me ideas to check. It is greatly appreciated.

I'll be reinstalling the repaired (that's a whole other story) tomorrow evening and hopefully, hopefully things will work as intended.

Have a great week everyone!

 

[opalbeetle]

Done! It's amazing what wonders a working alternator does for a charging system! Its charging right on spec!

Thanks again everyone.

 

[egtoro1]

Yup, the truck starts right up no problem at all. It appears to charge the batteries, though I wonder if there might be a problem with the batteries after the dead short. Maybe they aren't taking a charge.....hmmm. I thought I checked that, but I will add it to the list to recheck.

So what was the problem? I had weird situation today. Not exactly like yours but similar. Though i haven't done much testing.
A lot of times a bad battery ends up being the culprit...

 

[opalbeetle]

The problem ended up being a bad diode in the alternator (right out of the box). I had to send it back to get diagnosed and repaired.

 

[motoxnl]

bad diode in alternator can happen when you make heavy short cut. , good you found it