I replaced the battery on the 2000 dodge ram 1500 and it won't start lights will not turn on radio doesn't work no electrical activity the battery is new. Its possible that the terminals were hooked up backwards(neg to pos--) is there some sort of fuse or relay,breaker etc that possibly tripped.

Check underhood for a fuse/link box, locate the link or fuse labeled batt.check to see if it is blown.

I replaced the battery on the 2000 dodge ram 1500 and it won't start lights will not turn on radio doesn't work no electrical activity the battery is new. Its possible that the terminals were hooked up backwards(neg to pos--) is there some sort of fuse or relay,breaker etc that possibly tripped.

Electronics in today's newer vehicles don't like polarity being changed. Hopefully, you just blew a main fuse (located under the hood on the passenger side). Sometimes there is a fuseable link wire that will need to be replaced between the battery and the alternator.