[Nickelcharlie]

That is the fuse box and I know where that is. I found a wiring schematics someone posted in another forum that shows the fuse box and to the right of it shows a bus bare where ground wires are attached just like in a house fuse panel. The bus bar has been mentioned i some of the other articles. I do not see that in my 86 GMC. I took a screen shot of it but not able to post it here. It is a very detailed wiring schematics for the fuel tanks. Just wondering if some one knew where ground wires behind the dash were attached, for example the black wire coming off the dash tank switch? Trying to find all grounding places to makes sure they a clean!