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Old 06-12-2020, 09:42 AM   #1
Join Date: May 2019
Posts: 17
Strange electronic noises coming from engine when turned off

Hello good people,
So I recently replaced my three Interstate 31 ECL batteries (they were 8 years old :0 ) and the bus starts fine and everything, I just don't understand this weird electrical noise it makes when just sitting. It makes noises every day and I know that will be drawing some power so I would like to figure out how I might be able to solve this? If I could upload a video showing you where and how it sounds that would be ideal but it seems that doesn't allow that. The sound is coming from what I believe is the electrical box for the yellow arm that sticks out for the kids when getting off.

Thanks in advance.

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Old 06-12-2020, 09:57 AM   #2
Bus Geek
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Join Date: Jan 2019
Location: Philadelphia
Posts: 6,450
Year: 2003
Coachwork: International
Chassis: CE 300
Engine: DT466e
Rated Cap: 65C-43A
Upload the video to Youtube and then link to it.
Rusty 87 build thread
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Old 06-12-2020, 10:10 AM   #3
Join Date: May 2019
Posts: 17
Just solved it actually! I took off the box and found the fuse and disconnected it. Thanks for the feedback!
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Old 06-12-2020, 12:12 PM   #4
Bus Nut
Join Date: Jul 2016
Location: Western Oregon
Posts: 876
Year: 1995
Coachwork: Blue-Bird
Chassis: TC RE 3408
Engine: 5.9 Cummins 12V Mechanical/Allison MT643
Rated Cap: Blue-Bird says 72 pass.
And there should be a switch, somewhere near the batteries, mine is in the battery box just to the left of the batteries, that turns off all power flowing from the batteries. I like to keep mine turned off to prevent unpleasant surprises if the battery drains somehow while it is sitting for a while.
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