The clicking you hear is probably the relays, which means the switches are OK. Unless you have a Volvo scanner, you cannot get to the seat computer to clear its codes. Generic scanners don't work. Disconnecting the battery also won't work.
You could check the battery connections to make sure they are tight. Have you started the engine to see if that helps? An 8 year old battery could be problematic, but I doubt it in this instance.
There is also a large fuse for overload conditions, but that is supposed to last forever.
Klaus
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Always willing to listen, just not able to take direction.
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