dead short somewhere. If it doesn't blow immediately, but say when the jeep is driven I'd look at the harnesses first, to see if something got pinched or is rubbing on something.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.