caravan 3.0 start problem -wired coil wrong

caravan 3.0 start problem
my caravan wouldn't start --just sputter like it was out of gas
while doing some troubleshooting i mistakenly applied 12 volt + to the
negative terminal of the coil.
after that there was no more sputtering or spark.
what could i have burned out ?
any help greatly appreciated
bobby
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