qualityhardware
Member
Good evening. I have a 2420D that has been a stalwart since 2006. In the past few months, it has developed some electrical issues resulting in a no-start.
For over a year, the headlights, horn, and turn signals stopped functioning, but the rest of the tractor functioned flawlessly.
Oil pressure lamp, glow lamp, temp gauge, fuel gauge, coolant level light - all worked. Thermostart and regular start worked fine, until they didn't.
Current behavior is as follows. I will get the thermostart light when I turn the key left, dash instrument lights, step on the clutch safety after the glow lights turn off, turn the ignition to start, hear the starter solenoid click, and everything goes black. After that the whole tractor is dead. No lights, no clicks, no nothing. Dead.
I checked the battery, it was 12.6v and brand new. Set it on a charger overnight and went through this whole process again. Exact same result.
Checked the fuses in the fuse box. 5A, 10A, 10A, 15A glass tubes, all fuses intact.
This caused me to to investigate and I pulled the covers over the starter and dynamo. I found that a wire was touching the outside of the dynamo, and its rotation wore away the insulation to bare wire. I suspect that may be what caused the initial issues with the lights. Who knows. Spliced in new wire and zip-tied it out of the way so no more contact with the dynamo.
Next, I checked all the battery connections, cleaned everything, pulled the battery ground cable from the frame, cleaned it, the hardware, blasted everything with WD-40, and reinstalled the battery ground cable.
Went through the whole startup procedure again and had the exact same result. A solenoid click, then an entirely dead tractor. No lights, no clicks. Anything.
I replaced the dynamo, voltage regulator, and ignition switch. I got one successful start. Then it all went right back into this pattern. I was able to get a successful second start with an engine boost from the charger, but that hasn't worked a second time. When I got the start, I still had no headlights, horn, or turn signals.
Photos of the new dynamo and voltage regulator, as well as the wiring on the old ignition switch.
I am stumped. Thanks for any help / ideas / suggestions.
For over a year, the headlights, horn, and turn signals stopped functioning, but the rest of the tractor functioned flawlessly.
Oil pressure lamp, glow lamp, temp gauge, fuel gauge, coolant level light - all worked. Thermostart and regular start worked fine, until they didn't.
Current behavior is as follows. I will get the thermostart light when I turn the key left, dash instrument lights, step on the clutch safety after the glow lights turn off, turn the ignition to start, hear the starter solenoid click, and everything goes black. After that the whole tractor is dead. No lights, no clicks, no nothing. Dead.
I checked the battery, it was 12.6v and brand new. Set it on a charger overnight and went through this whole process again. Exact same result.
Checked the fuses in the fuse box. 5A, 10A, 10A, 15A glass tubes, all fuses intact.
This caused me to to investigate and I pulled the covers over the starter and dynamo. I found that a wire was touching the outside of the dynamo, and its rotation wore away the insulation to bare wire. I suspect that may be what caused the initial issues with the lights. Who knows. Spliced in new wire and zip-tied it out of the way so no more contact with the dynamo.
Next, I checked all the battery connections, cleaned everything, pulled the battery ground cable from the frame, cleaned it, the hardware, blasted everything with WD-40, and reinstalled the battery ground cable.
Went through the whole startup procedure again and had the exact same result. A solenoid click, then an entirely dead tractor. No lights, no clicks. Anything.
I replaced the dynamo, voltage regulator, and ignition switch. I got one successful start. Then it all went right back into this pattern. I was able to get a successful second start with an engine boost from the charger, but that hasn't worked a second time. When I got the start, I still had no headlights, horn, or turn signals.
Photos of the new dynamo and voltage regulator, as well as the wiring on the old ignition switch.
I am stumped. Thanks for any help / ideas / suggestions.
