Electrical issue caused by melted wires

I have a 02 focus se manual 2.0 zetec that has melted wires from the starter to the battery 3 times now from falling onto the egr pipe. The 1st time it burned just the black wires from the starter to the batery the 2nd same ones plus the ignition coil harness the 3rd just the black wires only this time they melted a hole in the egr tube. Ive changed my plugs n wires the starter and tebuilt the altenator the crankshaft position sensor fuel filter battery and again all wiring and at 1st cud get it to attempt to start but not turn over now its doing the same as it did when the starter went out I turn thr key n get nothing all my dash lights come on but not ding click or sound from the engine I used a test light on the fuses both under the hood and under the dash on drivers side under the hood there 2 I no that are major fuses that didnt light uo then a small 1 only 1side lit up then at the bottom like 4or5 little ones didnt and when I push 1of the the small relays in it makes the headlights come on wo the key even in it under the dash theres some that didnt light up but based on the door to the fuse box they are 1s for the lights cig lighter nothing major ive checked all other wires even tho they havent melted and found no issue so whats your theorys or suggestions on what I can do to get my car going again