Not sure when they went to a fuse box. Originally everything was individually fused which may be the case with your 51. It that's the case you'll need to put an in-line fuse on the main power wire. The low amp memory wire probably doesn't need one. As for where to connect your main power wire, it depends on how you want it to work. If you want it to play without the ignition on you'll need to hook to the battery side of the switch. If you want it to play only with the switch on you'll need to hook to the switched side. The memory wire would connect to the battery side of the switch to be hot all the time.

Last edited by Tiny; 12/26/2007 8:27 PM.
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