Originally Posted by timothale
Back in the old days the elect tech-repairman did not use those parallel line diagrams in the factory . We had large blow ups of the ones on the Hammer website. there is a link for the wiki colbalt327 posted above. or google hammar mustang wiring diagrams. both the Hammer pictorial shows a black groung wire to the CVU an down the page the schematic shows the CVU grounded.
shows no ground, just wires in and out. I suppose it could be said to be grounded by the attachment bracket, but my point is it need not be grounded to lower the current from 12 vdc to 5 vdc. If it did, there would be the symbol for a ground.