No chassis electrical

[raherres]

First post, so I apologize if this is wrong spot, or already answered. I have been 2 years into full body off resto of 87 v20 with T.B.I. 350. Everything that went back on was replaced with new or rebuilt. As many parts as available was AC Delco, everything else was researched for best option. Through this whole process I have found several answers to many problems or better ways to do things from this site, so thank all of you. My issue, that I tried to find a topic specfic to my biggest problem yet, is on the electrical side. Everything was finally ready to fire the engine for break-in, but when I trurned the key to on position volt, oil, and temp guages were obviously not working. I have all lights, turn signals, wipers, and 4WD indicator working, After going through here and a lot of googling most common solution was a ground. I have triple checked all grounds I am aware of, with no change in outcome. My next thought was fusible link, but I can’t find if there is more than one, or how to properly diagnos this. My cousin, who helped with the resto, is thinking ECM. I am really hoping someone has encountered something similar, or has a idea of where I should be looking.

 

[75gmck25]

Do you remember hooking up the instrument panel ground? Should be a black wire up under the dash, and on an ‘87 connected to a ground bus bar on the firewall up above your feet.

Also check to see the body is grounded to the engine (braided wire on the back passenger side of the engine) and the battery is grounded to the frame (wire from battery negative down to top of the frame near where a mechanical fuel pump would be).