Leaderboard

Your continuity tests might be confusing you. Better to measure resistance. And study the wiring diagram. If you look at the diagram I posted before you can see that Pin 34 is the ground circuit for the air regulator. And it's on the same circuit as the power supply for the pump. So if you measure continuity you are measuring back through the air regulator to ground. The pump ground wire is also connected to ground. So they are connected, circuit-wise, but only via a common ground and common power supply. The pump and air regulator are branches on the same circuit. If you measured resistance instead of continuity you'd probably get about 60 ohms,that's about what the air regulator heating element is. If you don't get 60 ohms then you might have a wire that has shorted directly to ground. It might also have destroyed your relay, or blown the fusible link. I would take a few more measurements, check your fusible links, and look for a wire with broken insulation.