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Re: battery terminal gets extremely hot. just replaced...
Sounds like for one reason or another that alternator is putting out too much voltage to battery. Did mechanic check to see if new alternator was rated same or close to old one, as in amperage rating? Pulley on new alternator same size? You'll need to get it to another mechanic who knows what he's doing, obviously that guy wasn't too concerned with curing your problem. That's why I was hoping you had a voltage reading when running.
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The battery gauge indicates alternator performance. Check the voltage at the large wire terminal on the back of the alternator with the engine running. If voltage is less than 14 vdc, remove the alternator and have it tested at your local parts store.
the worry is that the battery post is getting hot
that indicates a dead short ,probably at the starter motor terminal
the engine is classified as a interference engine so there will be bent valves from the broken belt
with the engine not turning over and you didn't mention any head work it is very possible that a valve is bent and jamming on the piston stopping it moving and that is overloading the starter and heating up the battery post
Looks like it is back to square one and do it again
Turn off and check positive cable for wear, if the cables outer covering is damaged, it can short to the chassis or other metal parts of the car.. and cause the cable to heat up. Leave it in that sate long enough and it will eventually melt. or in extreme cases cause a fire. If you find any damage, then replace said cable immediately
the battery light indicates that the alternator isn't charging the battery this might be the drive belt slipping/broken etc or the alternator not giving out enough charge check this with the engine running and put a voltmeter across battery terminals should read between13.25 and 14.25 i would also get the obd codes read
You may have either a bad ground wire/terminal or engine ground strap. If there is a lot of corrosion or bumps in the wire, it will make too much resistance and needs to be changed. The ground strap typically goes from the engine to the chassis on the passenger side of the vehicle.
Only needs two wires, run a 40 amp cable from the large terminal on the alternator marked +, direct to the positive terminal on the battery or to the battery supply feed to the starter (which ever is easier). Then run a wire from the terminal marked 'ind' to a 5watt bulb, other side of the bulb needs to be wired to an ignition live feed. That's makes it the charge indication light. You need to fit this light, without it the alternator will not charge!!!! Light will come on when you switch the ignition on, and go out when the engine is started. Put a volt meter across the battery, should get a reading of 13.5 to 14.5 volts with engine running. Good Luck.
Battery light is indicating that you have a problem with your charging system (alternator).
Sometime old faults are stored on system and need to clear the memory.
To clear the memory.
unplug both wires on battery terminal.
Touch them wire together that will clear any stored memory from the system.
Reconnect wire and re-check for any lights.
doug hard688, It sounds like you have an alternator issue here. The volt meter monitors the output of the alternator. The battery indicator will come on when you have a bad or weak alternator. When this happens you are running on the power of the battery alone and this does not last long. As you state here the radio quit working and your lights probably got dimmer with time. As far as the other lights coming on, when some systems don't have enough power to run them the lights will come on indicating a problem. I wouldn't worry about them until you have your charging system checked. You can do this yourself if you have a volt meter. Start the vehicle and put the meter's red lead on the positive terminal of the battery and the black lead on the negative side. A properly charging alternator will be putting out 13.6 to 14.6 volts. A few tenths of a volt either way out of these specs is nothing to worry about. However, a variation really far from these specs indicates an alternator problem. Good luck with this.