Crank, no start. Found chewed wire no clue what it is or where it went

Trying to figure out what this wire is and where it goes. Might not be what's wrong with the truck, hoping it is though.

Block Image

Block Image

Block Image

Block Image

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2944067:02crwdne2944067:0:

@jennywhite31399 what exact year, model and engine size is this?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

1988, 1500

5.7 v8

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0