Boeing Aircraft Solenoid Valves and Relays

Hi Gents

Hope your are well,

I have used this Mag-Probe for few years now with a good result. If you have a fuel valve, lets say on a Boeing Aircraft B737 that will not open, you have to start by taking the connector off and measure the right pins in the plug to find out if you have power to the valve or not. And this process takes time. First you have to go to the WDM and find out what pins are used to drive the valve . All this takes time. With this little Mag-Probe you simply put the probe next to the soleniod of the valve on a Boeing Aircraft and if the light turns on then for sure you have voltage to the valve.
Turn off the switch for the fuel valve then the light of the probe will go off/on. So its the magnetic field that the Mag Probe detects. I had this problem with a fuel valve that was stuck, and it was easy to find out that the electrical side of the valve was working. Its not possible to say that the Mag-Probe will replace a Fluke Meter in any way, but the probe is a fast way to troubleshoot and limit out some failed components. When everything else fails you can start using the Fluke 🙂

The probe is a useful tool for checking to see if a relay is working or not, by simply detecting the magnetic field with the Probe….

This message basically talks about using the Mag-Probe to separate Mechanical from Electrical problems first and then if the light comes on and the relay is still not working you know you have a mechanical problem and one of the solenoid valves or relays needs to be replaced. If the light does not come on when testing Boeing Aircraft solenoid valves or relays it’s time to use a Fluke Meter to make further tests. It’s that simple and will save a lot of time. Remember once you detect a magnetic field around solenoid valves or relays you know you have voltage, current and continuity. If you do not detect a magnetic field you instantly know you have an electrical problem with the solenoid valves or relays and more electrical tests will have to be made.