Reubo What can be done about the feed rail? Because I haven’t got a clue what that is, cheers.
It's represented here by the big green lines (& green arrow).
It's the power supply feed (or rail) from the ignition switch that supplies +12v from the ignition switch in X (accessories) and 15r (Terminal 15 which is ignition on; 'r' meaning engine running - as opposed to 15s, meaning ignition on, engine start) to fuses #14, 15, and 16 - with a link going off to fuse #23.
If you were to pull the fuse holder / box apart, it's literally a small metal rail at that point.
If you're not getting juice at 14/15/16, but there's +12v at terminal 30 at the ignition switch when it's on, there are only basically 3 causes -
- faulty ignition switch
- faulty connection &/or wire from ignition switch to fusebox
- faulty / broken rail in fuse box.