FRINC.

just got my first 85 12a a couple months ago now its on jack stands,so i had to put a new fuel level dending unit but the gauge still doesnt work it moves when u touch the yellow wire with a test light but other then that it stays on empty where is the relay for this i tried looking at a wiring diagram but it wont say where the relay is located...

Rx-7Doctor

iTrader: (13)

There is no relay. You have the sending unit and then you have the gauge. In my signature is the link to the FSM. Download a copy and you will find the test procedure to test the gauge and sending unit in there.