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Old 05-07-2012, 11:22 AM   #1
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Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,588
Four electrical device failures at one time

When we left AZ to head north to CO a week or so ago, four things stopped working at the same time.
The backup monitor, ignition key initiated step retraction, the ignition key initiated AUX solenoid activation, and the rear heater fan.

Of course at the time I didn't know all of them quit working. The monitor and the AUX solenoid were the two I saw first. 30 miles down the road I realized the steps were out when I knocked a couple of traffic cones over. The fan I didn't know about until I found the common point for the problem.

After we stopped I checked what I thought were the relevant fuses with no bad ones found, I then called Winnebago.
I either got a tech that wasn't very knowledgeable or I did a poor job of explaining the issue. He directed me to the 40 amp breaker in the control box in the propane bay. All of the breakers were fine and the one associated with the step ignition wasn't common with the AUX solenoid or back up monitor anyway - neither was the 40 amp breaker he felt was the problem.

After going through a bunch of schematics (thank you Winnebago for those) I found a common connection point for the backup monitor, AUX solenoid, and the step ignition wire. I also noticed that the rear heater fan was fed from this point. The common point was a fuse labeled "Step Warning". I checked and it was blown.

I unplugged the power connector from the monitor, replaced the fuse and turned the ignition key to run. The step came in and the AUX solenoid activated. Plugged the monitor in and it powered up.
Then I turned the rear heater fan on and sure enough the fuse blew.
When we started out I must have hit that switch when I meant to turn the overhead fans on.

So now when I get real ambitious I will have to find out what is wrong with the fan, I suspect it is locked up for some reason. Maybe crud has the shaft locked. I don't think wear is the issue because it hasn't been used for more than a few hours.
Getting to it is going to be a big problem. Right now I can't see a way to get to it. I will call Winnebago and see if they can tell me how.

I did unplug the dash fan switch connector so I won't accidentally blow the fuse again.
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Old 05-07-2012, 11:30 AM   #2
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Great troubleshooting Good job!
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Old 05-07-2012, 05:08 PM   #3
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Originally Posted by corvettec3 View Post
Great troubleshooting Good job!
Thank you!
Stuff that doesn't work bugs me until I figure it out.
DW said she is very happy I solved the problem because I was grumpy until I did.
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Old 05-07-2012, 08:22 PM   #4
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IRV2 Water Heater Removal Thread
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Old 05-08-2012, 10:19 AM   #5
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Originally Posted by John Hilley View Post
I took a look at where the fan assembly is located and it appears that removing the water heater is the only way to get to it. That looks like it will be a tough job.

Since I have only used the rear heater two or three times in eight years I may just not mess with it. Or maybe wait until I go back to the factory and let them do it.
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