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1983ChevroletWayne
Senior Member
Canada
173 Posts |
 Posted - 03/25/2014 : 5:57:53 PM
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Hey guys,
We have a 2008 IC/CE here that has constant electrical problems since last fall. I'm thinking the bus needs to be reprogrammed, but what do you think?
Here are the symptoms:
- Bus runs after key shut to off position (for about 2 minutes)
- Cluster stays powered (and illuminated) after bus is shut down (with park brake & ABS illuminated)- Two Way radio stays powered as well
- Cluster only sweeps water & fuel gauge on start-up
- Leave no student behind system will not function when bus is shut down (after the route).
- Leave no student behind system randomly activates itself through out the day when nobody is around(honking and flashing headlights).
The IDM relay and ECM relay have been replaced. Wiring on firewall looks good. Both body solinoids have been replaced. Key switch has been replaced a few times. wiring in the left panel looks good (on the solinoids). Fuses in the left panel are all good. Have tapped on all the relays in the panel with a screwdriver and the bus will not power down.
In order for the dash not to kill the batteries overnight, we pull the 15amp cluster fuse out of the panel, and plug it back in in the morning.
It seems that there is major back feeding coming from somewhere but we can't figure out where.
Any ideas? |
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bus a groove
Senior Member
70 Posts |
Posted - 03/26/2014 : 07:12:22 AM
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| Just an educated guess I would assume your having issues with the body control module. Also kinda sounds like water or corrosion issues. |
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Thomasbus24
Administrator
USA
4544 Posts |
Posted - 03/26/2014 : 08:38:07 AM
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| Have ALL of he grounds been disassembled, cleaned, reassembled and sealed? None of these buses can handle a dirty ground...makes them do all sorts of goofy things. |
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BJ Henderson
Advanced Member
USA
280 Posts |
Posted - 03/26/2014 : 10:00:59 AM
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I found on our BE 200s that the panel door didn't seal well. This resulted in some corrosion in the fuse panels causing all kinds of strange electron action!
It does not take a lot of corrosion.
Please keep us posted when you find the fix :) |
CMTT,CMAT,CMBT |
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second.flood
Top Member
USA
640 Posts |
Posted - 03/26/2014 : 11:42:41 AM
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Exactly.
We started screwing the door closed to keep a tight seal.
quote:
Originally posted by BJ Henderson
I found on our BE 200s that the panel door didn't seal well. This resulted in some corrosion in the fuse panels causing all kinds of strange electron action!
It does not take a lot of corrosion.
Please keep us posted when you find the fix :)
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Farmridge
Senior Member
51 Posts |
Posted - 03/27/2014 : 12:08:48 PM
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We have had issues similar to what your are describing and what I have found is the entire fuse and relay panel was loosing it's ground. I made a ground jumper wire from the panel to the body.
Also check your starter ground wires, that can cause the same thing. |
If you can't handle the answer, don't ask the question |
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1983ChevroletWayne
Senior Member
Canada
173 Posts |
Posted - 04/14/2014 : 08:19:42 AM
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Both the ignition relays (#1 and #2) were replaced in the side panel, and the bus hasn't acted up since! Hopefully this may help someone else down the road!
Thanks everybody for the help! |
Formerly "83ChevroletWayne"
Pic courtesy of: "schoolbusdriver.org" |
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CISDbusman
Advanced Member
306 Posts |
Posted - 04/15/2014 : 04:24:46 AM
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My 08 did just the opposite in a sense. I figured out one of the solenoids in the side panel was freezing (literally)in the open contact position. I removed the offending solenoid and set it on the shop heater for a day then gave it a good coat of spray can undercoat and its been working like a champ ever since.
Sealing the access door on the side of these things is critical. They also need a rubber or plastic flap over all the electrics. |
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1stLtDan
Active Member
USA
13 Posts |
Posted - 04/18/2014 : 07:22:50 AM
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| Just so you are aware - Maxx Force engine units we received a few years back had been to shop several times under warranty for electrical issues. Finaly I got tired of sending it and ran the electrical circuits myself. Up under dash where feed wires come in to the module by entrance door was loose - real loose. Tightened the lock nut down and have not had any issues since. Dan - Indiana |
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08 IC/CE Electrical gremlins on one of our buses
