Is your USE/STORE switch in USE?
There are generally two power leads to modern radios:
The "memory" power normally from the chassis battery, and
The "MAIN" power normally from the house batteries.
Other than my suggestion above you need to get a voltmeter and verify you have + 12 VDC to the leads that require it AND that the radio has a good ground.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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