Fairfield County, Ohio, USA | I really like the idea of using the 7pin connector, but right now neither of our relevant tractors have one (John Deere 4440 and 4230). Right now the sprayer already has a 7-pin connector... and I have no idea whether pin 7 is even used (I can't imagine what it would be for, if it is). But I should take a look in the next couple of days. I imagine I'd have to replace the trailer-side connector, and I'd have to figure out how to add the tractor-side connector also. The 4440 had one of these connectors (someone who owned it before we did added one) but it only worked for lights, and last year a grain cart's trailer cable got tangled in the PTO and destroyed the connector, all of the wiring on both sides, etc. No idea how/where it was even connected.
To get the lights working again, I need to replace the tractor-side 7pin connector. That's clear-cut. But for pin 7 (which I'm sure was not previously connected on the tractor), I assume I'm going to need fairly heavy fused wire for it also. Should I put a relay between it and the battery? I don't know what all pin 7 is commonly used for. The diagram posted by MiradaAcres indicates that it's switched power, so... might it be a bad idea to make it always-on?
Fixing the 7pin connector should take care of the lights, and presumably on the sprayer I could just run an adequately-heavy cable from pin 7 to the pump switch/relay. There's already a rocker switch at the pump. I haven't looked at its specs yet, but given that it hasn't melted down yet, presumably it's good enough? I went into this assuming that I'd just eliminate it and install a relay, along with a light duty switch, but perhaps I could just re-use that switch for local control.
List of the electrical things on the sprayer:
- rinse pump that we are discussing
- foam marker pump (not used; I don't care about it)
- lights (field, tail, hazard) -- via the trailer/7pin connector
- boom hydraulic solenoids (height, left boom extend, right boom extend) -- one is currently in the same harness as the rinse pump power
- Ag Leader equipment -- connects exclusively via the Ag Leader harness
That just leaves the boom solenoids; I need to rewire them anyway. Right now there's a hydraulic diverter at the back of the sprayer and a hydraulic selector at the back of the tractor (to give us control of all 3 devices with only one hydraulic remote). My intent is to eventually eliminate both of the existing devices and install a Fasse SprayMaster at the back of the sprayer. That would require 4 conductors (common negative, and one positive each for height, left, right). I talked with Fasse about it and they said that 18 AWG would be adequate. But even if I don't get that done this year, I could still use that cable to power the one solenoid already back there. Just need to find the right 4-conductor cable for that, and fabricate a switch box for in the tractor cab.
Sorry. This seems to have turned into a brain-dump while I organize my thoughts.
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Which relay, switch, connectors, etc to connect pull-type sprayer to tractor power
