M&EM - Thanks for the comments to my chassis battery wiring issues. You may have the answer. My Boost switch on my dashboard has never worked so the solonoid my have always been the issue. Do you have four wires to your chassis battery and if so - how are they wired. I will try to tap the solonoid to day to see if it lets loose and if not - should i replace it. Thanks so much - I was hoping to find someone who may have the same set up so I can finally figure this out.