Hi,
When you say that you tried jumping the starter and the radio turned on, where were you jumping it? Was it in the relay box or right at the starter motor? If it was at the starter itself and nothing happened, either you have a dead battery, no connection between the battery and the starter stud, or the starter is faulty.
I attached the wiring schematic below for the circuit so that you have a reference.
At the starter, there will be a heavy gauge red wire that has battery voltage at all times. Confirm that this is the case.
There is also a smaller gauge purple wire that won't have power to it until the key is in the start position. Have a helper turn the key to start and check the purple wire for power.
Let me know what you find,
Take care,
joe
See pics below.
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Sunday, November 12th, 2023 AT 8:57 PM