P1000 aux battery HELP!

[Buckslayr]

Have you by chance swapted the meter + input wires to see if you get same results?

no i haven’t done that , thanks

 

[Admin]

 

[Peterhope]

well I've come to the conclusion its the isolator,I hooked a seperate battery to it and same reading of 12.5 volts,I know both used to be 14.4.I will get a new isolater and try that,

I’ve read this thread with great interest and tried to follow the testing and results.
I went to the Trueam website and they have a troubleshooting testing guide that I tried to include in my reply here. (hope it worked). I think that you’ve tried all the steps required to conclude a bad isolator but maybe double check the procedure. Just trying to help.

 

[Buckslayr]

I’ve read this thread with great interest and tried to follow the testing and results.
I went to the Trueam website and they have a troubleshooting testing guide that I tried to include in my reply here. (hope it worked). I think that you’ve tried all the steps required to conclude a bad isolator but maybe double check the procedure. Just trying to help.

View attachment 364052

new isolator solved problem. both charging at 14.3 now, thanks for all who replied.

 

[Peterhope]

new isolator solved problem. both charging at 14.3 now, thanks for all who replied.

Thanks for the update. Always nice to hear/see the problem and find the definitive solution. I hate when we are left hanging wondering what happened.

 

[Hondasxs]

new isolator solved problem. both charging at 14.3 now, thanks for all who replied.

Kool. Glad it fixed it.
I'm still pondering as to why it would pass voltage but not be able to maintain it.
IDK... Questions we will never know.
Thanks for the follow up.

 

[Scoop]

New battery is on my list but I'll probably wait until the most inconvenient time in a very remote place before I find out I have to replace it.

FIFY

 

[HappyCamper]

Hi guys. I'm having the same issue but I already bought a new isolator and it didn't solve the problem. Now I'm at a loss as to where to go to get this bug fixed? My volt meter agrees with my guage and I only have 12.2 v at the battery. When running I check the posts on the isolator and on one side (OEM battery) it shows charging and the other side just shows battery voltage, 12.2. Any ideas would be greatly appreciated. Thanks

 

[CID]

Hi guys. I'm having the same issue but I already bought a new isolator and it didn't solve the problem. Now I'm at a loss as to where to go to get this bug fixed? My volt meter agrees with my guage and I only have 12.2 v at the battery. When running I check the posts on the isolator and on one side (OEM battery) it shows charging and the other side just shows battery voltage, 12.2. Any ideas would be greatly appreciated. Thanks

If it's a True isolator, is the pigtail grounded properly?

Shown here in the bottom left -

 

[DRZRon1]

Really need a sketch of what’s wired where and some pics -plus a little history - you do it - someone else - what’s been recently changed - did it ever work - hard to internet shoot without much to go on other than it does not work - thanks 🙏

 

[HappyCamper]

I did it all myself and it has worked fine since 2016. Now, only the main battery shows charging. Checking with a volt meter, the stud on the isolator going to the aux battery never shows a charging state, only battery voltage, which is at present 12.2. I put a tender on the aux battery a couple of days ago and it's back to full charge now but when I start the engine the gauge only shows 14.4 on the main battery. Still no charging going on with the aux.

 

[TripleB]

Hi guys. I'm having the same issue but I already bought a new isolator and it didn't solve the problem. Now I'm at a loss as to where to go to get this bug fixed? My volt meter agrees with my guage and I only have 12.2 v at the battery. When running I check the posts on the isolator and on one side (OEM battery) it shows charging and the other side just shows battery voltage, 12.2. Any ideas would be greatly appreciated. Thanks

It's possible that the new isolator is bad. Not likely but possible. I've had 2 of them go bad over time.

 

[DRZRon1]

I did it all myself and it has worked fine since 2016. Now, only the main battery shows charging. Checking with a volt meter, the stud on the isolator going to the aux battery never shows a charging state, only battery voltage, which is at present 12.2. I put a tender on the aux battery a couple of days ago and it's back to full charge now but when I start the engine the gauge only shows 14.4 on the main battery. Still no charging going on with the aux.

You have a good ground from the little wire on the isolator ?

I’d run a jumper from that to negative on main battery as it takes a minute to rule that out.

Also - you sure the aux battery is any good ? You have it load tested by chance?


Any spare good batteries around from a garden tractor, etc. to rule that out.

Other than that it’s a simple circuit - just make sure all your ground connections are cleaned, solid and tight

 

[CID]

I did it all myself and it has worked fine since 2016. ...

Like DRZRon1, there's nothing in the circuit but the ground pigtail. It's been shaking around since 2016 and may have broken inside the insulation, maybe at the end of a soldered terminal. Run the suggested jumper directly from the isolator to the battery ground terminal to test.

 

[HappyCamper]

Seems to me if the ground was bad would it be able to charge one battery and not the other?

 

[DRZRon1]

Correct - the main will charge from the alternator unless that circuit is fubar. This thingy is just a voltage sensitive contactor (but electronic) that closes when the main is sufficiently charged. That little ground wire is like the negative lead of a voltmeter / needs a ground reference.