[ducked]

Circuit 5 (15A wiper/turn) has 0.15A, with a clicking relay sound when energised
.
circuit 7 (15A Gauge) has 0.42A.

The latter fuse was blown, so I suppose this circuit is an especial suspect for short-to-earth damage. It is also the only circuit that shows continuity-to-earth on both halves of the circuit with the fuse removed.

Temperature gauge and radiator fan control switch relay earth circuit have been out for a while, before I reversed the polarity accidentally while investigating.

Similarly the fan relay solenoid live side was out, and I had lost one (out of 3) indicators on the drivers side, and 2/3 on the passenger side. Bulbs and bulb holder contacts seemed OK.

Now (post-reversal) I have no indicators working on the RHS and the hazard switch no longer does anything.

Cant really interpret the turn signal and hazard switch circuit diagram, but it seems more sophisticated than I'd expect a trad bi-metallic thermal switch to be and seems to show some (presumably rather small) "black boxes", labelled "Open detecting circuit", "oscillating circuit", and "relay driving circuit".

There are 3 capacitors shown but apparently no diodes.