4250 flashers

[4520BW]

4250 with sound guard cab only left flashers work. Turn signals work on both sides as should. Replaced the flasher/turnsignal controller and still to left side flashers only. Any ideas?? Thanks

 

[JD Dave]

Sounds like an open-circuit issue for 4-way flashers. I can't say for sure but I suggest you run down the electrical schematic for the tractor and trace through the details. Maybe try changing out the flasher(s) before you go crazy with the diagnosis.

 

[matthies]

Check the connector on the back side of the light switch, they tend to slide off a bit and not make a good connection.

 

[Tx Jim]

I suggest to check cab wiring ground connections especially the connection encircled in green. Different photos for different range of serial #s

 

[4520BW]

If I had a bad ground would the turn signals not flash also?

 

[Tx Jim]

Poor electrical grounds can cause electrical operated devices to act crazy. It's always a good practice to check for good ground connections. IMHO electrical ground connections are very easy to overlook! I also suggest to check cab to tractor frame ground connection & wiring connection under RH front cab post.

 

[Fixingfarmer]

If you look close your left side at the rear rear has a corresponding closer to the left bulbs ground just like Tx Jim circled on the other side that might be in better condition

I’m not sure if there’s a ground wire between left and right side but I doubt it they probably run 2 wires both hot to each side. Quick way to test would be long jumper wire from your non working lights to known good ground down below or even to the other side