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Old 07-03-2020, 01:43 PM   #1
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Post 3126 Cat with a Starting Problem

I own a 2001 Blue Bird All American (A3RE) with a 3126 Cat . THe starter burnt out on me and I had it rebuilt. My neighbor next door removed and installed it. Now when you put the Battery cables on the batteries (I just brought 2 new batteries).
The engine begins the spin (if the key is on, the bus will start). I am lost on the wiring issues or where to look next.

Any reasonable answers? I am up against the clock right now!

I Won't Complain School Bus Conversion (I.W.C. Bus)
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Old 07-03-2020, 03:03 PM   #2
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sounds like someone connected one of the battery + wires to the small so9lenoid engagement terminal on the starter so it spins as soon as you hook up the batteries, or one of the wires from the large battery + terminal is bad and has shorted against the solenoid engagement terminal.
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Old 07-03-2020, 06:57 PM   #3
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I think cadillackid nailed it on the small pos wires connected wrongly.
With batteries disconnected go to the starter. See how many smaller guage wires you have there. The starter solenoid should be marked with "S" and "R" terminals. It may be these are reversed and a simple changeover may get you back in order.
Can you get pics of this as is now, might help explain better if we can see what the neighbor did.


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Old 07-05-2020, 03:35 PM   #4
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I have also seen when tightening the positive battery cable it will rotate and make contact on the s terminal.
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Old 07-05-2020, 03:46 PM   #5
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Maybe the starter relay is shot and is stuck in the "on" position. Or maybe the ignition switch is bad and the "start" position is shorting to the "on" position. That would keep the starter engaged when you were driving, and "burn it out". Check your wiring, and check to see that the wire for the starter solenoid is NOT hot, unless the key is in the start position.
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