Join Date: Jan 2012
Location: I would rather not say
Hi. Sorry for reviving old topics, but my subwoofer also did not work in my new alfa 159 SW. Today I checked all wirings and all wires and connectors were OK, subwoofer was also okay. Bose for 159 has a subwoofer amp in another box under the big amp for everything else, and that mini amp for subwoofer has relay for supplying circuit when car is on. This relay caused a problem for me. It clicked but contacts are burn, so circuit didn't get +12V. Part number of relay is JSM1A-12V-5, but you can put almost everything in, make sure that is rated for 10A+. Its common relay used in automotive industry. I spent around 1 hour for disassembly, but I didn't check any drawings, so it should be less if you know how to disassemble bose sub/amp unit.