That battery cable trick worked in the 1970's on back, but then, still, you were putting the voltage regulator at risk with a voltage spike (so what was $30.00 back then?)
Nowadays, the alternator is the least of your worries, spiking a modern car might mean a "New Computer", "expensive modules", someone to diagnose the now exponentially more complicated problem, expensive computer stuff, and that is even before the problem at hand can be diagnosed.
Bad WAYERS87, Bad WAYERS87!
But, I was serious about the possibilities of what can happen.
Maybe you got lucky.
Look under "Electrical" in this link on how to properly test the battery and alternator
As far as the battery goes, remove it and take it to a popular auto parts store for thorough testing.
This might aid you should you need a new anything. A124/ TRT30/ TRT41, still worked a week or so ago.
It may just be a bad battery, It may be that the juice from the alternator is not reaching the battery.
After the battery check/ charge/ replace test the system using my first link, or again take it to the auto store to insure the alternator is charging the battery.
If it is not, I will find you a diagram on what all is in the charging system that could go wrong/ along with locations of the parts. If you do need this info, send me your VIN number, it will insure I get the correct diagram for you.
Regardless, Come back and keep us updated on the situation!
We like happy endings!
Wednesday, July 27th, 2016 AT 3:10 PM