Pete 359 3406B Jake Switch

Three wires going into this four prong switch. 2 wires are going to the jakes and 1 wire is going down to the switch on back of pump. Other wire on the back of pump is going to the clutch switch. Which wire is continuously “hot”?

 

Yeah, it’s been rewired, cobbled in places and wire color means little, at this point. I’ve got a 359 wiring schematic but it only shows Cummins jakes. None of the wires at the switch are hot with key “on”. Unless something is wrong at the dash switch, then I’m guessing power, is coming from one of the wires at the switch on the pump? It then make a loop through the clutch switch, then up to the dash switch, then out to the jakes? Maybe I’m arse backwards on it??

 

I got a ton of stuff to do, especially on farm equipment. Drink a couple beers towards the end of the day and why I walked over and started tinkering on this is beyond me. I’m a glutton for this crap.