Charging issues

Topic: Charging issues (Read 2426 times) previous topic - next topic

Re: Charging issues

Reply #50 – March 11, 2023, 03:35:05 pm

Having a tone tracer will make it easier to trace the wires. Could the old alternator been OK and the
problem was no ignition current and no voltage to the sense post.

Re: Charging issues

Reply #51 – March 11, 2023, 03:58:21 pm

The old alternator was not a duvac. Just a regular 160 amp.

Re: Charging issues

Reply #52 – March 11, 2023, 04:08:44 pm

If your coach still has the diode-based battery isolator, you MUST use a DUVAC as that external sense wire signals the alternator to put out enough volts to compensate for the voltage loss across the isolator. The goal is to get the correct charge voltage to the chassis battery (which also gets the correct charge voltage to the house batteries assuming the system is working properly.

Re: Charging issues

Reply #53 – March 11, 2023, 04:10:21 pm

As Peter suggests, a tone tracer would be handy for checking the wires. You can buy one for not much $ at the big box stores. Since your coach has had so many alternator swaps, almost any kind of damage to the OEM wires is conceivable. Perhaps the wires you have connected to your alternator are not connected to anything on the other end. Stranger things have happened...

I wouldn't be too resistant to the idea of running a new set of EXCITE and SENSE wires. It might be the quickest solution.

Re: Charging issues

Reply #54 – March 11, 2023, 04:19:16 pm

Quote from: Chuck & Jeannie – March 11, 2023, 04:10:21 pm

I wouldn't be too resistant to the idea of running a new set of EXCITE and SENSE wires. It might be the quickest solution.

YUP!

Yes, long term, find the other end of both excite and sense, since both are HOT (sense hot all the time, excite ignition hot).

Re: Charging issues

Reply #55 – March 11, 2023, 04:39:12 pm

So many comments to try and sort through on here. Im working offy phone. So let me clarify.
Excite wire needs to be hot with ignition on only
Sense wire should be hot all the time?

Sense is E86 and goes to the remote stop button after the cir breaker on isolator panel (there is not one there that i can see)
Excite wire is E6 and goes to circ beaker 35 in the main panel. (It has got to be broke somewhere in between.

Re: Charging issues

Reply #56 – March 11, 2023, 04:41:13 pm

You can do what Chuck suggested and run two new wires and get it going and then you have
lots of time to trace out the old wires and use them later if you want to. Yes to your last question.

Re: Charging issues

Reply #57 – March 11, 2023, 04:41:18 pm

Yes that is correct

Re: Charging issues

Reply #58 – March 11, 2023, 05:19:49 pm

Quote from: Wpduffey – March 11, 2023, 04:39:12 pm

Sense is E86 and goes to the remote stop button after the cir breaker on isolator panel (there is not one there that i can see)

Looking at the bottom center portion of schematic B-2126 linked below, I would disagree with this statement. According to the schematic, the SENSE wire is E59 (white) and it goes from the alternator to a 15A circuit breaker on the isolator panel, after which it goes to the START battery post on the isolator. This same E59 wire is also shown in the small schematic I posted in Reply #46.

https://www.foreforums.com/index.php?action=media;sa=media;in=3297

Re: Charging issues

Reply #59 – March 11, 2023, 05:31:58 pm

I dont have a circuit breaker in the isolator panel. Where is it and what does it look like? There is nothing there but the isolator, the solenoid and the batteries there. I saw all the pix in rhe other alternator posts. My doesn't look like that.

Re: Charging issues

Reply #60 – March 11, 2023, 05:32:49 pm

Is it one of these under the bed?

Re: Charging issues

Reply #61 – March 11, 2023, 05:38:19 pm

Is it one of these!

Re: Charging issues

Reply #62 – March 11, 2023, 05:44:25 pm

Quote from: Wpduffey – March 11, 2023, 05:38:19 pm

Is it one of these!

It could be one of those in the photo.

You are looking for a circuit breaker exactly like the ones on that big panel near your entry door. In your photo, there are 2 of them mounted below the silver solenoid (which might be your AUX START solenoid).

I don't know what the two items are in the right side of the photo.

You need to pull back the split wire protector on all those wires and see if you can find any wiring ID labels. If you find labels, compare the ID numbers to your wiring schematic. That's the best way to figure out what you are looking at on your coach.

Re: Charging issues

Reply #63 – March 11, 2023, 05:53:02 pm

I have no power to the remote start either. But cant find a clear answer if that supposed to be ignition hot or always hot. I read ten pages in here of Yes and No. With no definitive answer.

Re: Charging issues

Reply #64 – March 11, 2023, 05:59:44 pm

Key on only time there is power at the remote start. If the remote start and stop push switches are original I would replace both. Mine shorted out and the stop button killed the Ignition while running on my coach.
Larry

Re: Charging issues

Reply #65 – March 11, 2023, 06:48:12 pm

If The E86 wire is supposed be hot all the time as the sense wire, it also goes right to the remote start button which is only ignition hot?
I'm gonna replace with new breakers, relays and remote start Solenoid. All of it looks corroded and crusty.
I can read all the numbers clearly if anyone know what they are.

Still don't understand why the ignition exciter wire is not getting power.

I will have post a picture separately from my phone.

Re: Charging issues

Reply #66 – March 11, 2023, 06:52:06 pm

This is all needs worked over.
The one on the left is open or the far left leg! The rest of that bar is hot. Id replace all of it if i just knew what everything is and where it is.

Re: Charging issues

Reply #67 – March 11, 2023, 07:01:08 pm

The bar supplies power the the circuit breaker for the 2 wires on the left. Should be auto reset but am not sure. Get a number off it and buy one.

Re: Charging issues

Reply #68 – March 11, 2023, 07:13:13 pm

Yes sir, i get that, the bar gets power from the far right side. The one on the left is not resetting as best i can tell. There are no numbers left on them. Looking at the schematic i believe they are 15 amp.

Re: Charging issues

Reply #69 – March 11, 2023, 07:16:29 pm

A looking at the pic. shown the breaker on the left should be 15amps and the one on the right should be 20amp. auto reset.

@ Chuck. The stuff on the right hand panel is due to this coach is a 270.

Mike

Re: Charging issues

Reply #70 – March 11, 2023, 08:51:10 pm

SO, the left-hand circuit breaker in the photo is open (tripped) and will not reset.

What is the odds one of those two wires on the "load" (non-powered) post of the left-hand circuit breaker might be the SENSE wire?

Any bets?

Re: Charging issues

Reply #71 – March 11, 2023, 09:15:41 pm

Im gonna replace both and probably those two relays as well. Trying to find the numbers for that remote start solenoid and the switches for it.
All of those contacts are sketchy

Re: Charging issues

Reply #72 – March 11, 2023, 10:53:46 pm

Quote from: Wpduffey – March 11, 2023, 09:15:41 pm

Trying to find the numbers for that remote start solenoid...

You don't have a separate "remote start solenoid" on your coach.

You DO have a AUX START solenoid (or on some model years a AUX START relay), and you have a BOOST solenoid. (There is also a STARTER solenoid bolted to the starter, but that's another subject)

At the front end of the coach you have a IGNITION solenoid (either one or two, depending on model year).

If you are talking about replacing the round silver solenoid in your photo, the model usually recommended on the Forum is a Cole Hersee 24213. It can be used as a AUX START solenoid, and as a BOOST solenoid, and as a IGNITION solenoid. Works very well in all three applications.

Cole Hersee 24213 12V 200A Continuous Solenoid

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Re: Charging issues

Reply #73 – March 12, 2023, 06:44:05 am

Quote from: Chuck & Jeannie – March 11, 2023, 08:51:10 pm

What is the odds one of those two wires on the "load" (non-powered) post of the left-hand circuit breaker might be the SENSE wire?

Somewhere around %100

Quote from: Wpduffey – March 11, 2023, 09:15:41 pm

Im gonna replace both and probably those two relays as well.

Doing that may fix some of the dash A/C problems. One of those is for the condenser fan the other is for the compressor clutch.

Mike

Re: Charging issues

Reply #74 – March 12, 2023, 10:23:02 am

Quote from: Wpduffey – March 11, 2023, 09:15:41 pm

Trying to find the numbers for that remote start solenoid and the switches for it.
All of those contacts are sketchy

The "Remote Start Switch" operates the same starter solenoid(s) as does the ignition switch.

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