A member with a 2022 Winnebago Adventurer 29B reports that the dash radio only works in the house-battery position and shuts off in the drive position, even with the engine running. They verified the yellow memory wire only has power in the down position, checked fuses, and replaced the switch, but the radio still loses presets whenever power is turned off. The main practical concern is preserving radio memory without leaving the unit powered by the house batteries and risking battery drain...
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A member with a 2022 Winnebago Adventurer 29B reports that the dash radio only works in the house-battery position and shuts off in the drive position, even with the engine running. They verified the yellow memory wire only has power in the down position, checked fuses, and replaced the switch, but the radio still loses presets whenever power is turned off. The main practical concern is preserving radio memory without leaving the unit powered by the house batteries and risking battery drain.
The main reply focused on whether the coach was still factory stock and suggested the issue could stem from prior electrical changes, a reversed switch function, a loose connector, or a backed-out pin at the main plug. After the original poster confirmed the wiring appears stock, the most supported next step was tracing the circuit farther upstream and reseating the radio harness connections. A fallback workaround discussed was running a fused constant-power lead from the chassis battery to maintain presets.
The clearest takeaway is that the member already ruled out the most obvious fixes, so the remaining likely causes are hidden wiring damage, a connector issue, or incorrect feed routing from a previous owner. If no fault is easily found, adding a properly fused constant 12V memory wire from the chassis side appears to be the most practical solution.
