First thing you do is look ay fuse relay card. Numero uno culprit for intermittant cut outs, codes 5G,5J. Remove the second relay from the left and look carefully at botton female slots. They may be fried, causing loss of current to VM. Remove the other relays and compare the female connectors to each other. They should be all tight together. Any discoloration or gap between pins indicates a new fuse card is needed. The relay will often appear burned as well. And always check for shorts to frame, battery voltage leak with an ampmeter. If the pins are just starting to get bad on the board, and the relay is fried, you can, as a temp repair, use the fourth relay on right and swap with the second one (after you cleaned the female pins) All your trucks will eventually fry the relay boards>>>