2014 Ford Focus electrical wiring

2014 ford focus se problems with the alarm going off in the middle of the night. sensor on dash showing “hood open” when it’s not. phone radio sounding like very weird - low voices or high pitched voices. electrical problems. Transmission problems from day one. Back door recalled. Now something to due with a stuck canister purge valve. My main concern right now is the electrical wiring. I thought I read somewhere about wiring under the seat catching fire. Not sure if that’s true or not

I would have my battery tested first. Newer cars do wierd electrical things anymore when the battery is going