I hardwired an aftermarket radio into the 12v port wire, and it seems to be always on.. for the past 20 minutes, even when the car is off. Is that by design? 2010 Expy SSV.
Trying to install an aftermarket head unit myself for the first time and couldn't get it to work.
2010 Ford expedition SSV. OEM radio works fine.
Disconnected old radio. Connected a 24pin wire harness in:
- Ignition
- Battery
- Ground
- All speaker wires (8 of them)
- Power antenna
Turned on...
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