I installed a mechanical oil pressure gauge in my new used motorhome last week. Tonight I thought I would go out and hook up the wires for the light. I got the bright idea of using a needle to stick a likely wire so I could hook up a tester to see if it had power.
Thing were pretty confusing under the dash but I did see one white wire and though, "ah, white probably is for the lights." Stuck it and the tester gave no voltage. So I pulled the needle out. Immediately I heard a hissing sound. I grabbed the "wire" where I had stuck it and the hissing stopped. I immediately remembered that vacuum was involved in swinging doors to open and shut the heater and air conditioner ducting, and figured I had stuck one of them (it leads up the the heater/air con controls area). But why was it pressurized when the key was off.
I got some Household Goop out and coated the "wire" (now known to be a tube, no wonder it was so hard to stick and a bit stiffer than a wire should be). I am letting it dry overnight and will fire it up in the morning. My hope is that it will recharge its pressure when the engine is turned on, but if not, then I don't know what to do next. Will try the heater, defrost, air con, etc tomorrow am and hope it all works. By the time I read any responses I will know what happens. Hopefully I got the area covered (put Goop along about 1.5 inches of the tube).
Arrrrrghhhh!
Needless to say, the gauge lamp is not hooked up, but I will just route longer wires all the way from the fuse box and not poke anymore "wires."
Thing were pretty confusing under the dash but I did see one white wire and though, "ah, white probably is for the lights." Stuck it and the tester gave no voltage. So I pulled the needle out. Immediately I heard a hissing sound. I grabbed the "wire" where I had stuck it and the hissing stopped. I immediately remembered that vacuum was involved in swinging doors to open and shut the heater and air conditioner ducting, and figured I had stuck one of them (it leads up the the heater/air con controls area). But why was it pressurized when the key was off.
I got some Household Goop out and coated the "wire" (now known to be a tube, no wonder it was so hard to stick and a bit stiffer than a wire should be). I am letting it dry overnight and will fire it up in the morning. My hope is that it will recharge its pressure when the engine is turned on, but if not, then I don't know what to do next. Will try the heater, defrost, air con, etc tomorrow am and hope it all works. By the time I read any responses I will know what happens. Hopefully I got the area covered (put Goop along about 1.5 inches of the tube).
Arrrrrghhhh!
Needless to say, the gauge lamp is not hooked up, but I will just route longer wires all the way from the fuse box and not poke anymore "wires."
