[Archived]

You could have a high chassis voltage or a low voltage such as due to a failure of the alternator to charge the batteries.

This is a serious issue and any dash warning light should be a cause for immediate concern. In this case I would urge you monitor your chassis electric voltage gauge and determine if it is high or low voltage. High voltage (anything near 30 volts or more) is cause for an immediate shut down to avoid damage to wiring or devices.

If it is low voltage, such as caused by a failed alternator or voltage regulator you are unlikely to damage anything in the electric system of the chassis, but depending on how long this has been going on you may be facing an imminent shut down of the coach or failure to be able to restart the coach unless and until the chassis batteries can be recharged.

Do you have an electrical tester such as a multi-tester so you can provide more info to help us help you?

[Patrick]

Could be as simple as a bad battery as Prevost found with one of my NAPA batteries less than 6 months old. Dead cell.

[Archived]

But whatever it is a red light on the dash (any light actually) should be an immediate cause for concern.

[Rob&Sue]

Mine could have been a battery balance light if I remember right.

[Craig]

You have to determine what is wrong as Jon pointed out, it could be a simple as the monitor, just did mine after confirming the equalizer was good and charging circuit was functioning correct.

Sign up for the Seminar in October, it will pay for itself down the road.

[Ronald]

Jon’s, posting encompasses the electrical system UP TO introduction of Prevost Multiplex systems. If you look in your lower drivers bay finding no relay bank and a bank of ECM’s you have MultiPlex, beginning in late 2006.

Seeing a dash battery light blink when entering my 2007 H3-45 was cause for concern.

Speaking to Prevost ….One of your four starting batteries has a weak cell. In the early days Prevost set the perimeters low to alert of a potential problem.

This setting was too low and now changed slightly higher so the dash light would not be so sensitive. In my case … started with a basic test to confirm or eliminate a failing battery OR a failing Vanner.

Vanner tested satisfactory so my start battery group was disconnected then separated testing each one. One battery of four was the problem. All four were replaced with NAPA batteries ordered from NAPA warehouse bearing identical birth date codes.

At my next visit to Prevost ….it was suggested to increase the strike point higher to flash my dash light, just a lap top adjustment.

AL

[Jerry]

Definitely check the voltage at the lugs on the equalizer for the most accurate readings. If everything is within the margins be thinking about a new style regulator (5 screw) similar to the one Tom has in the picture. Your coach is about at the age where the old style (4 screw) one will give you wacky readings and cause a battery light to come on. They are about $200 at the Prevost store.

Prevost part #563439. I think they started using these on the 2004 and up shell anyway.

[Archived]

That’s not a regulator, it’s the equalizer monitor.

[Dan]

All of us are trying to help the person who started this thread, and I have to admit to a degree of frustration because he has been silent and we have no clue what is going on.

This entire web site was set up so Prevost owners could get the benefit of our combined knowledge relating to our coaches. One of the benefits is when any of us has a question we now have the collected knowledge and experience of over 3500 members. I admit is is very difficult to diagnose or analyze a problem on the internet and when a question is asked, the quality of the responses is often dependent upon the information provided. That makes the questioner and responders carry a certain burden.

Questioners need a lot of information to provide accurate responses and there might be some posts following the question that need a response to isolate the cause of a problem and suggest a fix.

Responders have the burden of trying to put all the information that is available together so their answers have some validity and are not all over the map.

But a thread can be pretty much just a collection of anecdotes if there is no feedback such as this thread has become. To the person that made the first post: can we get an update or some response to questions? We all learn from these threads and all questions are important, but if responses are met with silence we don’t know any more than what was in the first post.

[Roger]

Jon, you are so correct. Sorry I have not responded. I am new to this “game”. I thought I would get an email alert when I got a response, probably don’t have something setup correctly so I do. I had that yellow light go on and off before I replaced my start batteries about 6/8 months ago. It might be as easy as one bad battery?? Coach starts just fine but I do keep a trickle charger on them while it’s parked in the barn.

should I test all my batteries and see if I have a bad one?

[Archived]

The starting point when you get a warning light is to determine what it is saying.

Issues with voltage are typically a light with a hi/lo voltage indicator and that requires a voltage check to find out if it is high, in which case you need to shut down unti you can correct that problem or risk burning something up, or if it is low to determine if you can nurse the coach to a safe spot to diagnose and repair.

A blue “bal” light is a indicator you may have an issue with the equalizer, and a failure to maintain a healthy 12 volt circuit may prevent staarting or keeping the engine runing.

But ow you mention a yellow light. That could be a check engine light.

Regardless of what lights you are getting, before you leap to any conclusions you have two things you must do. First, get out your book or go to th Prevost website and find out exactly what the lights and gauges are telling you. As an owner and operator of a very complex vehicle if you hop in and start driving without any effort to at least understand the basics you could easily get in trouble and become at risk under some circumstances.

Once you are able to know what the gauges and lights are saying to you your are in a very good position to go further and with a meter or readings from your dash gauges verify everything is OK, or that a problem does exist which can the lead to knowing how to deal with the issue.

Do not be intimidated. Every single one of us has had the same type of moments you are going through and those of us that survived have learned there is help right here on this forum,or from Prevost or your converter. Every one of us was clueless when we got our first Prevost and we kow how scary it can get when something isn’t right.

But remember before jumping to conclusions or even thinking an anecdote on the forum is the answer you are looking for at least do some basic learning and checking to get more precise information about exactly what us going on. The quality of answers to your questions us directly proportional to the quality of the information you provide.