755 Not Starting !

[Kevin M]

Turn the key to start and nothing. Battery at 12.50 volts , Fuses are good , relay by air cleaner working. What I did notice is that what appears to be an ignition module under the dash panel is also clicking, when key is in start position. No power at the starter though. I have a meter and test light. Fire away with suggestions !

 

[Kevin M]

Along with that module,The coolant temp light is coming on when the key is in the start position

 

[Kevin M]

The tractor ran fine all day long yesterday.

 

[Willl]

12.5 is a little low, what voltage do you get during crank ?

If little change, starting at the batt posts them selves, work your way down the heavy start cable. Retesting at every change in the cable. IE; post-clamp-cable-crimp-frame would be a typical ground cable path.

Follow the ground all the way to the frame and the positive all the way to your start solenoid.

 

[jenkinsph]

Clean all the connections as Will mentions first. If you have a charger I would put it on the battery and top it off. If it cranks up fine then check the charging voltage and see what it is, should be about 14+ volts. If you get a good charging voltage and after setting the battery voltage drops below 12.6 volts the battery is suspect.

 

[Kevin M]

Thanks Will , My problem is that it won't crank at all.

 

[Kevin M]

Thanks guys this thing cranked fine yesterday and ran all day. It won't crank at all now.
The battery appears fine , I'm thinking its a safety switch or that ignition module just to quit all of the sudden like that.

 

[Willl]

Thanks Will , My problem is that it won't crank at all.

Yes, I realize that. What's your voltage while trying to crank ?

 

[Kevin M]

Thanks Will, It drops to 12 volts exactly.

 

[Kevin M]

I just attached start assist, commercial battery charger to and still nothing. This totally rules out the battery. Still no voltage at the starter , I'm gonna try jumping the seat switch.