Hey guys, sorry if there's already a thread. But I've been searchin gand searching. Can't seem to find anything.

I'm stumped. Got an 87 sport coupe. My temp light, oil, and battery all in the center of my dash will not come on. Checked the fuses, all were bad. Replaced them, and still nothing. My husband and I don't know maybe if its the wiring? Or the sending units. But leaning more towards wiring, because inside turn signals, and service engine light also doesn't come on before I turn the car over.

Any advice please!
I'll post a picture if neeeded. Thanks!

 

Check your grounds?

 

What are the grounds? Should I worry about the oil and temperature sending units?