Jump from 1 battery to the other

Lately I have been having to use jumper cables to go from 1 battery to the other in order to get my truck to start. I had both batteries tested and they tested good. I have changed both positive cable ends. I also changed the starter and the solenoid on the fender, because at first I thought it was dragging because of 1 of them. Now I am thinking that the positive cable between the 2 batteries is bad. Can a battery cable break?:fustrate:

Sounds like at least one of the batteries has a bad ground. I would remove both and clean/ examine them.

Thank you. I never thought about a ground. I will check that after work.

Yeah I had to do that after getting frustrated at jumping my car every single morning. I cleaned it and it worked just in time for the first snow fall

After getting the batteries checked where I bought them. They were good. Then I changed all the cable ends to cable lugs, and put marine style battery posts...........It still did the same thing. So, despite the starter testing good at Oreilly, I put a new one anyway. And........It fired right up.