battery cable
 

Hello I am asking for a little help, I changed the battery cable in my truck 7.3 diesel, 2 battery's, cable to solenoid on fender and the cable to the starter, now the truck wont turn over, just clicks. I know everything is right to the battery's and to the starter, maybe I messed something up on the fender solenoid. Any ideas? Thanks

I would start with checking the small wire on the starter. After that the ground wire to the block

Starter
 

I took both wires back off the starter and re-installed them after trying a spare solenoid that did not solve the problem and it runs once again. Thank You