Community Forums

Les Birch · 02-18-2020, 12:38 PM

Hi Monaco owners
I have a 1999 Signature and in the engine compartment are two panels the on the curbside has a couple of what appears to be electric solenoids and both appear to have damage from heat and moisture before I replaced the seals around it. My question is can anyone give me the item id's and possibly a serial number so I can get replacements? The items are in the attached pictures for reference. Sorry about the upside down not sure why that happened.
TYA Les Birch

JJTL · 02-18-2020, 01:13 PM

Hi there, these look to be the main 12V solenoids that are controlled by the "Salesman Switch" in the entry way of the coach. On our 2001 Signature, we had one go bad that controlled the 12V to the front of the coach.

Attached is the diagram I have for these solenoids. If these are indeed the same ones you're referencing then you want solenoids that are "80A Continuous Duty 12V, single pole, normally open"

The NAPA part# is ST85, I believe. Keep in mind these look very similar to ignition solenoids, however, there is a difference. Make sure the replacement you buy is rated for continuous use.

Here is the thread I created when I had my solenoid issue, might be helpful for added context/information: https://www.irv2.com/forums/f115/200...ms-465616.html

Les Birch · 02-18-2020, 09:08 PM

Hey JJ,
Thank You for the information that is exactly what I have so I ordered a pair of them to change out before I have a problem.
Les

vito.a · 02-19-2020, 10:12 PM

I see in your picture you also have an Intellitec Big Boy relay.
If you find out your chassis batteries are not charging when plugged into shore power it is probably the Intellitec Big Boy relay. I've had to rebuild the Big Boy on every coach I've owned and many friends coaches as well.
You can replace the Big Boy, or rebuild it. It's relatively easy but be careful as there is a lot of current available from the batteries.

Rebuild instructions courtesy of Mike Canter.