Mazda 6 Service Manual: No.2 mil illuminates

No.1 melting of main or other fuses

No.3 will not crank

Other materials:

Mazda 6 Service Manual: Contact Authorized Mazda Dealer and Have Vehicle Inspected
If any of the following warning lights or the indicator light turns on/flashes, the system may have a malfunction. Contact an Authorized Mazda Dealer to have your vehicle inspected. ...

Mazda 6 Service Manual: Front door removal/installation
1. Disconnect the negative battery cable. 2. To remove the front door hinge, remove the front fender panel. 3. To remove the checker, remove the door speaker. 4. Remove in the order indicated in the table. 5. Install in the reverse order of removal. 6. Adjust the front door. (See DOOR ADJUS ...