What's wrong with my 04 ford focus?

I have a 2004 ford focus that until recently was the best car i've owned. It just passed 75,000 miles and suddenly little things are happening. The check engine and battery light are dimly lit and stay lit when the car is off. It wouldnt start one day.changed plugs and wires basic maintnence battery is new and bam started right up. Now all my lights are lighting up and stayin lit on my instrument panel even when the car is off. Open door, check engine, battery, oil light and airbag close door and lock and lights stay on. Worried about killing the battery. I think it could b electrical which i'm not equipped to handle nor would i like to handle. Any tips would b awesome

Likely a ground has come loose somewhere. You need to take it into an auto electrical shop. NOT the dealer as they will charge you a fortune.

I have a 2004 Focus SE Wagon with 117,000 mile son it. So far, so good. I have the PZEV 2.3L engine with timing chain.

It is electrical. With the key out of the ignition, the battery dash light and the check engine light should not be on. Disconnect the battery cable when you stop the car (to prevent an electrical fire). Maybe a rat gnawed some wires. Could be just the ignition switch. You need to pull the OBD 2 codes (Advance, Autozone, etc. Will do it free).

I would take it to the dealership where they have an electrical specialist that is trained by Ford for these problems and deals with them daily. You pay by the actual time for electrical usually with a minimum charge…
I could site dozens of my real examples from our fleet but a personal example… Years ago my Volvo had starter wiring short so I had it towed to the electrical shop…$450 and days later I'm good to for about a year then AC problems and I see bare wiring… I take it to the dealer they tell me they just change the complete engine wiring harness… This insulation just starts cracking off as they age… Complete new factory harness installed… Just over $500 it was done that afternoon… That harness went to starter alternator, AC, distributor etc… Everything on the engine from the firewall…

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