1996 Sonoma 4X4

We tried a new actuator same result at one point pressed 4 hi and all the dash lights for the 4 wheel drive started blinking all 3 and kept doing it turned the key off they quit turn the key back on they would start flashing again all 3 until we disconnected the battery. Checked the tccm in the middle of the dash for broken or corroded wires all clean and tight 0 corrosion. Put it all back together hooked up the battery turned the key on cycled the key on and off 5 times as told to in another forum started it up and pushed 4 hi and it went there immediately heard the motor go on the tranfer case at the same time. Backed out of the garage but just back wheels would spin even though the dash had 4 hi lit up kept driving 20 mph went a mile and fuse blew while I was pushing the 2hi and 4 hi buttons no codes at anytime.