Why is my bronco dieing while going down the road ? all the electrical ,shuts off and the dies?

3 days ago i had a power surge in my bronco ,i went to park turned off the key and it didnt shut off ,i got out and pulled the coil wire , babied it home. next day checked everything ,ie. fuses alt. batt.toggle switches.all good ,go 1 mile and it quits running ,tow to a shop . he said the ignition module burnt out .159.00 and 150 labor .i get in go 2 blocks ,dies again ? i took it back ,the thing is in mint condition ,but when i got it last month it had several wires cut ? so i put in starter,battery,water pump,radiator ,hoses,belts .reconnect all wirers ,and drive from oregan to az .all has been fine for 3 weeks excert only 12.36 volts when operate,use a twst light and it will jump to 13.66 volts ,tested alt at checker ,a+ check all fusible links x56 of them .check all wires under the hood ,like new , when i had the surge the other day it blew out both head lights im a good mechanic , i love a good challenge , i do all ,brakes to engines , but dang it im stumped . this is an 86 ford bronco 5.2 fuel injected 302 v8 4x4 in mint shape , this is a nice truck ,it sat for 2 years before i got ,hence all the parts ,injectors leak a tad , but why all the electrical now ?why didnt the fuse pop first rather than the head lights , ac motor went as fast as a jet at the same time , they cut the battery lead to alt and wired to a toggle switch,and a wire feeds the fuse panel ,no power inside with key switch . ill send you a pound of fudge or 20.00 just to pick a brain . tomorrow the shop will call wanting more money too. i gave 200.00 already and nothing to show for it . im unemployed ,dont they know? HELP .HELP;this has got me bad , no sleep .bad dreams trying to think ....what it is ? dam computers leave em in the house not in my truck please................