AC low pressure switch jump doesn't engage pump clutch but....
I've been reading post after post and have gotten to this point. Jumping the low pressure switch plug doesn't engage my pump clutch, however if I connect my test light up to the battery ground and put it in the plug it turns the clutch on. I'm not sure what to think about the jump not working but doing this from my battery ground does.
My ac is pressurized to around 45psi and the switch is getting continuity.
Any help would be appreciated