I'm not familiar with the BX2380 but on my LX2610, the work light circuit terminates in a pair of bullet connectors under the right rear fender. If yours is similar, replace the fuse and use a multimeter set to DC voltage between the connectors of the red/blue wire and the black wire when the tractor is off. If you see something around 12-14 volts, the relay wiring is suspect.
- red/black-always-hot
- red/blue-hot-with-ignition-switch
- black-ground
***Disregard as my logic was flawed with this. As Fordtech86 mentions below, only the relay would remain powered with the tractor off if the constant power and switched power were swapped at the relay.***
So a year later and I finally solved this problem with basically this post. Was waiting till winter and between storms to send it to the dealer. The funny thing is when I did send it to the dealer, they caught one boo boo that happened I'm assuming during install: the work light ground (black male end) was inserted into one of the female bullet connectors. I think the dealer assumed this would fix the problem....they unplugged the connectors......they replaced a blown 15amp DC outlet CB ...then taped up the work light bullet connectors and told me it was fixed........
Couple of days after I get the Tractor back, I come back in town after a trip.....I go to start my tractor and the battery is pretty much dead. So I called the dealer back....they try to tell me that it's normal.......which I don't believe for a second. Next day I test for the Parasitic Draw again and find it again showing a 140mA draw (full disclosure...when I measured the Parasitic Draw last time showing 300mA, I was using an old style multimeter with a needle which looked like it was made in 1950...not as accurate as my new digital Meter).
So .....now I revisit this thread to see if I missed anything....and yep....this post is what clued me in. So I go back to the bullet connectors and pulled the tape off the ones the dealer taped and look at the one the chute deflector is connected to to see what is connected to what. THE DEALER HAD THE WIRE IN THE WRONG BULLET CONNECTOR. I put the wire into the correct female end.....I check the circuit breaker for clicking when pulling it in and out (nothing!)....and then test for and find NO parasitic draw. I fire up the tractor and test the chute deflector switch for normal operation....and it works as intended....and there is no draw on the battery when the tractor is off.
To be fair....it's very very hard to discern visually between the Red/Blue and Red/Black wires (thanks Kubota). To be blunt tho.....it took me about 20 seconds with my Meter to figure out which one was the hot wire and which was the switched wire....which is kind of unforgivable for the dealer given I had done all the troubleshooting for them in the first place (with the parasitic draw). They didn't test whether they had fixed the problem....then worse....told me it was normal when I called them back saying by battery was dead 4 days after getting my tractor home. Ooof! Now I'm wondering what else they missed in the past.