I have a 2008 Itasca Impulse 31C. The house battery disconnect stopped working a few years ago. I replaced the switch and it still didn't work. I'm now getting some free time on my hands and wanting to fix this. I found, what I think is the battery disconnect relay? (see picture) According the wiring diagram, there's a 5AMP fuse. From pictures I've seen of a new relay, there's two 5AMP fuses. Looking at mine, it looks like the right one is missing. Could this be my issue? Could it really be that simple?

It appears that all your terminals should be cleaned. But if the fuse is blowing, that means the electromagnet is shorted.

So clean terminals, and don’t add a fuse? I don’t know if there ever was a fuse on the right side, I do see one on the left.

There is a wire connected to the one that is there, is there a dangling broken wire? that would connect to the missing fuse, I suspect your Itasca never had a second fuse, have you gone to Winnebago to download the schematics, they mfg Itasca

The extra fuse holder may be for a spare fuse.Or it may be not usedOne school of thought is to fuse both positive and negative leades.. Some things do that (Some of my radios) I won't go into why. Others do not feel the negative needs a fuse. My thing. If the somewhat rare failure ICOM and Kenwood think my radios need protection against happens.. Well the radios are hundreds to 2,000 dollars.That switch.a couple bucks.

See page 5 of Service manualFrom page 5There are two 5 Amp fuses for the system, mounted on each relay. Looking at the relay with cap at the top, thefuse on the right feeds the LED indicator and if so equipped, the digital voltmeter. The fuse on the left feeds thepower to the switch that operates the solenoid.Use a volt meter across the small terminals. The polarity to those terminals should reverse when switch is moved from one location to the opposite. Relay should have strong click when operated and working.Use a medium size wire jumper between the large terminals. It should have small spark and system is working if 12-volt power comes on.

House Battery Disconnect Not Working | Good Sam Community

Tom_Barb
Explorer
May 01, 2023
It appears that all your terminals should be cleaned.
But if the fuse is blowing, that means the electromagnet is shorted.
mando_man
Explorer
May 01, 2023
So clean terminals, and don’t add a fuse? I don’t know if there ever was a fuse on the right side, I do see one on the left.
MrWizard
Moderator
May 01, 2023
There is a wire connected to the one that is there, is there a dangling broken wire? that would connect to the missing fuse, I suspect your Itasca never had a second fuse, have you gone to Winnebago to download the schematics, they mfg Itasca
wa8yxm
Explorer III
May 01, 2023
The extra fuse holder may be for a spare fuse.
Or it may be not used

One school of thought is to fuse both positive and negative leades.. Some things do that (Some of my radios) I won't go into why.

Others do not feel the negative needs a fuse.

My thing. If the somewhat rare failure ICOM and Kenwood think my radios need protection against happens.. Well the radios are hundreds to 2,000 dollars.

That switch.a couple bucks.
enblethen
Nomad
May 01, 2023
See page 5 of Service manual
From page 5
There are two 5 Amp fuses for the system, mounted on each relay. Looking at the relay with cap at the top, the
fuse on the right feeds the LED indicator and if so equipped, the digital voltmeter. The fuse on the left feeds the
power to the switch that operates the solenoid.

Use a volt meter across the small terminals. The polarity to those terminals should reverse when switch is moved from one location to the opposite. Relay should have strong click when operated and working.
Use a medium size wire jumper between the large terminals. It should have small spark and system is working if 12-volt power comes on.
opnspaces
Navigator II
May 01, 2023
personally I would just put a fuse in and see what happens.
midnightsadie
Explorer II
May 01, 2023
yep pull that fuse clean things up before you get really into it. could be that fuse. is dirty.
dougrainer
Nomad
May 01, 2023
MOST, (not all) Intellitec Solenoids have 2- 5 amp fuses. I would install a fuse in the empty slot and see what happens on the disconnect. ADDING that fuse will not cause any harm. Doug
wnjj
Explorer II
May 01, 2023
The fuse for the solenoid probably blew before and someone just grabbed the one from the LED indicator (the right side missing one) to replace the blown one. Adding the one back probably will not help, but the obvious question is: Is the existing fuse still good?
mando_man
Explorer
May 01, 2023
OK, checked wire that looked like it was somehow going in with the fuse on the left, it isn't. Fuse looks good. Added fuse on the right and no change. Checked voltage on I and S according to service manual recommended by enblethen and voltage sits at zero when engaging/disengaging cutoff switch. When pressing switch, you do hear a loud click. When checking other connections, I'm getting 12.4-12.7v.

I haven't had time to clean the terminals yet, was looking at this with my neighbor on lunch. I'll see if I have time after work to do some cleaning. It's a tight space, not so fun to work in.