I thought my boost switch didn't work due to the switch or solenoid. Turns out the light on the rocker was bad. I ordered a pack of 2721s and replaced it. Boost is still not working but that's due to bad house batteries that I need to replace. <br/><br/>I ended up checking all the rockers lights, 3 were bad. Two more packs of Hella 2721s showed up. Super easy to replace. It's 6...