dasd radio switch

[john223]

Georgetown 303se is the dasd radio switch 4 wire or 5 wire .red to Ford hardness (acc#2 only) another red to coach power center, white ground ,blue ? and brown ? A few dead switch blocks just hanging around behind dasd plus tons of wire I have 4 wire to running lights switch and 4 wire to map lights switch both ok

[F and E Damp]

John:

That switch is intended to allow radio power from either the house batteries or the chassis batteries, depending on what you're doing. It seems to switch over (on my rig anyway) without interrupting the power to the radio, as I don't have to reprogram the memory if I switch it.