My 1988 Ranger XLT, 2.9 RWD, manual, was running great and had never exhibited any hesitation whatsoever with starting. That was prior to three days ago, when it would turn over but would not start. I uncovered a large fresh rodent nest in the area between the air cleaner and the passenger fender where the relays and wire harnesses like to congregate. I could detect no evidence of wiring damage or missing material there or anywhere else under the hood. Engine starting fluid sprayed Directly into air intake With no firing and no starting. In view of the likelihood that the critters disturbed the electrical system in the vicinity of their nest, what is my most logical next step troubleshooting?