How to Repair a Couple of Wiring Harness Problems

The large red wire that is the problem is the main power feed into the car...so this needs a lot of attention!

With the greenish corrosion on the connector surface and dirt in some connections, I would reccommend a wholesale removal and inspection of each connection here. The little slots on the edge of each connector give access to a release; put a tiny flat blade screwdriver in each side slot and lever towards the connector to release the spade connector and pull it out the back. Clean each connection and replace any connection with corrosion; getting a good crimp is the hard part. Use dielectric grease like Dow 4 for protection afterwards.