When mowing my JD 625R cuts off when deck is lowered

Sorry, it is a 652R. with PTO on and deck is up it will drive fine but as soon as the deck is lowered, and you try to drive it will cut off. I have checked all the safety switches. At the bottom there are 2 wires in that circuit going to a small black box, but it does not have a switch on it. It is just a small black box about 3/8 thick and 1 inch wide. I have not tried to jump that one yet as my time ran out on it but I will try tomorrow. Any suggestions would help a lot. Thanks
 
Does it look like this ? And what are the two wire colors so I can look over the schematic?
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Or a picture of the part might help.
 
Let me ask a question to jog my memory. I haven't work on one in at least 3 yrs. Is this the one where the deck and the engine deck moves as one piece? I seem to remember it does. If so that causes quite a bit movement in the wiring harness.
 
Yes, that is correct and after looking this morning I don't think the piece I was talking about is not my problem. It is a blue and white connector but the connector is like a trailer or charger connection. I guess I will just have to start tracing wires. I have tried to find a wiring diagram but so far no luck. When the pto is on and deck is lowered it does not cut off immediately but runs for a few seconds to 2 or 3 minutes before dying. It is really taxing my brain.
 

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That is the anti inductive kickback diode for the PTO clutch.
1785327266294.png

Now JD does change wire color at times but keep the same wire numbers.

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