Battery won't stay charged, it is brand new battery, alternator has been checked and it is good, blown BTN 60 watt fuse, on 1994 Mazda Protege.

sound like blowed fuse or fuse link near the battery or battery cables need replacing.check see if alternator getting 12 volts at the battery feed wire.

Connecting jumper cables the wrong wat around most likely has damaged electronic components such as a radio and computer.
Check the fuse box and replace any blown fuses.
If you still have problems then get an auto electrician to fix your car.

look for main fuse panel under hood, there should be a charging circuit fuse check it

I had a similar problem on my 98 Tioga (Ford v10). Turnd out to be just a blown fuse in the cab (wich controls the alternator's regulator.) First, confirm its the charging system and not the battery it's self. To do this, start the engine and take a voltage reading at the battery. It should be above 13 volts. If you don't have a tester, with the engine running, disconnect a battery terminal. If the engine stalls, it's proff the alternator is not out putting as it should. Check for a blown or missing fuse. Anything labeled "intrusment cluster" or "Alt" (maybe 14). If the fuses are ok you'll likely need to replace the alternator it's self. On those engines it's not hard to do. Only takes about 20 min and the the alternators are around $130. But defiantly check the fuses first.

You might have a bad alternator. Take your battery in to have it tested and if it is good then it is probably you alternator. Good luck

Dead battery or blown main fuse. Follow the positive battery cable to the fuse box and check the large main fuse.

get yourself a new alternator i had the same problem with my ford explorer good luck

You must have blown a master fuse or fusible link.

Refer to the maintenance manual.

this happens sometimes during a jump start or a direct short in the elect system.

r/
David

THERE IS A FUSE ON THE BACK OF THE HEAD UNIT PULL THE RADIO AND CHECK THAT. **NOW THAT IS ONLY FOR AFTERMARKET HEAD UNITS. IF IT IS STOCK CHECK COMMON FUSES CONNECTING THE RED TO BLACK AND BLACK TO RED ON ACCIDENT USEUALLY IS THE CAUSE OF THAT. U SHOULD BE OK THOUGH RUN THE FUSES

check for a big heavy fuse nearf the battery,i dont know if it has one?? iam a general mechanic not a mazada specialist,try this trick ? start engine and hold rpm at 1500,then disconnect battery and see if engine stops if it carries on running then altenator is working.If it carries on running then turn on all electrical thingys except the radio.If its still running ok then fault is elsewhere like a discharge overnight.