Bobcat 753 c 1994, No Lift & tilt, 3 flashing on "Valve" control

[AndrewA2202]

My first post, thank you for this forum. As stated, I have no lift or tilt. After start up and the arm is down with traction released, the green LED on controller is flashing a (3) blink sequence. Best info avail to me is a downloaded manual for serial nos earlier. The (3) blink diagnostic points to a "short to gnd" or "no ground". Has anyone experienced this problem? Where would you suggest I start my search. Does anyone know of issues with harness. Thank You

 

[mmsllc]

I will take a stab at it. Lift the cab up. Look by the wiring connections on the left side (as you are sitting in the seat & looking forward) of the machine. They should be several electrical connections there. One of them should be a ground. This is the are where the cab controls plug into the machines wiring harness. If you find a single black wire that is bolted to the steel frame, then you have at least found a ground. Check it out for rust, being loose or simply being broken off. I have also found that the cab wiring rubs through / chats really bad on the sharp edge of the rear of the cab. Check all of those wires out for any obvious problems. Repair any wires that you can see copper on. I am hoping that you find the problem there, as it is the easiest area to get to.

 

[7LBSSMALLIE]

I will take a stab at it. Lift the cab up. Look by the wiring connections on the left side (as you are sitting in the seat & looking forward) of the machine. They should be several electrical connections there. One of them should be a ground. This is the are where the cab controls plug into the machines wiring harness. If you find a single black wire that is bolted to the steel frame, then you have at least found a ground. Check it out for rust, being loose or simply being broken off. I have also found that the cab wiring rubs through / chats really bad on the sharp edge of the rear of the cab. Check all of those wires out for any obvious problems. Repair any wires that you can see copper on. I am hoping that you find the problem there, as it is the easiest area to get to.

bics lockout solenoid part# 6671025. sticks out sideways on control valve. replace it.