Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 03-16-2022, 05:45 AM   #1
Junior Member
 
Brand: Thor Motor Coach
State: Arizona
Posts: 9
THOR #24378
Chassis Isolator engages then disengages

Please help.
I have a 2005 Presidio 39a
Has a battery boost monitor reset switch.
To start I have to turn the key on and push the monitor reset switch and it engages the chassis isolator that turns the power on to the dash.
Now when I hit the monitor reset switch I get the lights on the dash for a second and then they turn off. I can hear the chassis isolator engage and disengage.
Had to bypass the isolator today to get home.
Any suggestions would be appreciated.
Thank you,
Mike

__________________
New RV guy is offline   Reply With Quote
Old 03-16-2022, 11:55 AM   #2
CHS
Senior Member
 
Brand: Thor Motor Coach
Model: 2019 Chateau 28Z
State: Tennessee
Posts: 472
THOR #22388
Quote:
Originally Posted by New RV guy View Post
Please help.
I have a 2005 Presidio 39a
Has a battery boost monitor reset switch.
To start I have to turn the key on and push the monitor reset switch and it engages the chassis isolator that turns the power on to the dash.
Now when I hit the monitor reset switch I get the lights on the dash for a second and then they turn off. I can hear the chassis isolator engage and disengage.
Had to bypass the isolator today to get home.
Any suggestions would be appreciated.
Thank you,
Mike
I would guess that if you bypassed the isolator and all worked fine, than that isolator would be bad.
I found this:
How do you know if your battery isolator is bad?
Check the voltage at your batteries. If you are not seeing close to the same voltage at the battery as at the isolator (minus some small voltage drop over the wire), you have another problem. If the voltage is 12.7 volts or below, you are probably only seeing the battery voltage and no charging at all is occurring.
__________________
2019 Thor Chateau 28Z 2018 E-450 Chassis W/ V10
4 Wheel tow a 2021 Ford Ranger Lariat 4X4 W/ Blue Ox Alpha Tow Bar/Base Plate and Stay-IN-Play DUO Brake system.
CHS is offline   Reply With Quote
Old 03-16-2022, 02:01 PM   #3
Junior Member
 
Brand: Thor Motor Coach
State: Arizona
Posts: 9
THOR #24378
I switched out the isolator with one in the battery bay and still same problem.
It seems like there is some sort of time delay in the system when I hit the monitor reset switch with key on it originally would engage the chassis isolator and power up the dash with key on. If I didn’t start it within a couple minutes it would disengage the isolator. Now when I hit the monitor reset switch it powers up just for a second and turns back off. Been trying to find a wiring diagram to see everything it runs through.
__________________
New RV guy is offline   Reply With Quote
Old 03-17-2022, 01:45 PM   #4
Senior Member
 
Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 1,410
THOR #2631
Quote:
Originally Posted by New RV guy View Post
I switched out the isolator with one in the battery bay and still same problem.
It seems like there is some sort of time delay in the system when I hit the monitor reset switch with key on it originally would engage the chassis isolator and power up the dash with key on. If I didnít start it within a couple minutes it would disengage the isolator. Now when I hit the monitor reset switch it powers up just for a second and turns back off. Been trying to find a wiring diagram to see everything it runs through.



I am not familiar with your coach at all, but from your description about trying both your battery connect relays in the chassis battery application and still having a problem getting ignition power to stay on (both relays would not stay operated Ė sounds like they are not latching style or they were being turned off by the control system), it would appear that the circuit that operates your chassis battery connect relay and keeps it operational, has a problem. Canít help with a schematic, but I was wondering if your 2005 coach uses a Vansco multiplex control system to control battery systems in your coach? If Vansco equipped, perhaps all your battery relays (latching or basic powered interconnect style relays that join coach and chassis batteries together under certain voltage and time conditions) are controlled by the Vansco? Search some other forums IRV2 if you donít get a fix here, as I think there were some issues with Vansco controllers in and around 2005......... but may not be your issue.
__________________
javelin is offline   Reply With Quote
Old 03-17-2022, 11:05 PM   #5
Junior Member
 
Brand: Thor Motor Coach
State: Arizona
Posts: 9
THOR #24378
Thank you for the reply.
Called previous owner. The system uses the Bird system intellitec.
He was the original owner.
RV used to start with just the key.
A few years ago it wouldn’t start unless you hit the auxiliary monitor reset button which powers the big boy chassis isolator. Now hitting the monitor reset switch won’t fully engage the isolator. I’m trying to find the rocker switch to start with that first. Otherwise I’ll run a direct wire with a toggle switch on the dash to turn the isolator on and off.
__________________
New RV guy is offline   Reply With Quote
Old 03-17-2022, 11:27 PM   #6
Senior Member
 
OldWEB's Avatar
 
Brand: Thor Motor Coach
Model: 2011 FW Hurricane 33T
State: England
Posts: 1,159
THOR #16471
The terminology in this thread is a little confusing.
Here is a copy of a typical BIRD system (All I can find is the gas version), Your Mileage May Vary.
On the last page shows the "typical" three disconnects, Coach (house) Disconnect; Isolator Relay (some call Emergency Start); Chassis Disconnect.
Now the Chassis and Coach disconnects are operated from near the door or where you may have some central control system (you did not answer when asked) and usually the Emergency Start switch (one way to control the Isolator Relay) is on the dash by the steering column.
So what is it you have in addition to a BIRD (if you found it)? Pics are always nice.
__________________
OldWEB is offline   Reply With Quote
Old 03-17-2022, 11:37 PM   #7
Senior Member
 
OldWEB's Avatar
 
Brand: Thor Motor Coach
Model: 2011 FW Hurricane 33T
State: England
Posts: 1,159
THOR #16471
BIRD Diesel

https://intellitec.com/wp-content/up...-00839-000.pdf


Found the diesel version which just neglects to cover what you may have for Chassis/Coach Disconnects.


So the symptom you describe would tell ME your Chassis battery has no juice and you use the disconnect to give it that from the Coach battery.
Can you use a voltmeter?
__________________
OldWEB is offline   Reply With Quote
Old 03-18-2022, 03:09 PM   #8
Junior Member
 
Brand: Thor Motor Coach
State: Arizona
Posts: 9
THOR #24378
Thank you for the information.
I’m a little new at this and working on the terminology.
All my Battery’s are 10 months old. Voltmeter reading was 13.2 on chassis battery’s. I’m not sure how to load photos on to the message.
I have my main panel about the stairs that has all the house switches on it and the main house disconnect. All that works fine. When I bought the RV the old owner said I had to turn the key on and push the monitor reset switch which is the bottom side of the rocker switch for the battery boost. With key on and pushing the monitor reset switch the dash lights would come on and I could start the RV.
Now when I push the monitor reset switch the dash lights come on for a second and turn right back off. Come to find out when I hit that switch it engages the Big boy relay isolator back by the Diesel motor on the frame. Replaced the isolator and still the same problem. I had to jump the posts to power up the chassis and get home. Trying to figure what is in my circuit the engages the isolator when the key is turned on.
__________________
New RV guy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 05:05 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2