No reverse or turn signal. Help Please!

You have a wire break inside the insulation or a bad connector. Check the fuse socket for power with fuse in place and the engine running. Some small pieces of aluminum foil on the tabs for the fuse may help here. Be creative with an add in fuse holder and some crimp on connectors and achieve the same thing. No power and the problem is upstream of the fuse holder. If power is present, check to see that it is the same as battery voltage. Turn on several items that run off that fuse and note any voltage drops more than 5. volt.

If all the voltages check out OK at the fuse panel you have a problem downstream of the fuse. Get your magnifying glass out and scan the diagrams for a common wire or connector in series with the fuse panel and feeds the loads on that circuit.