The one I got with my proportioning valve leaked immediately. I went to a NAPA one, that needed a lot of pressure for it to work. I found one that trips at 45 psi on eBay, I carry a spare in the glove box. I test all my lights on a weekly basis. If I have to sit at a light and the car wants to roll, I set the e-brake lightly. That continuous amperage that the switch sees is not good for it.