The voltage regulator in your altenator took a shit on your chest. Remove the altenator and have it tested off the car. If this is the issue, check all of your wire harnesses for damage.
It could also be a slight short in the system but most likely it is the altenator. Start with the easy and free stuff first.
__________________
1998 Escort ZX2, T3 Super 60 at 8 psi, SCT Xcal2, Cobra MAF, 42#/hr injectors, MSD coil, Ford Racing wires, Ford Racing UDP, Fidanza flywheel, Spec 3 clutch, B&M shifter, Trubendz 2.5" exhaust, 19mm RSB, ES bushing kit, Eibach sportline springs, other goodies....
| 
