Not sure, I don't run vts gauges on my skis. You can feel the difference in the ski when it's up or down. Sorry, not of any help. Google seadoo vts dei 451. It's a relay hack to get around the module. But I remember a guy who did a bunch of research and testing, but I believe documented stuff like that. Inside the module there is glass thing or sensors and he gives you a way to test it.