Schematic diagramme of 2TS81417L (+O)
This was supplied by Advance Auto Wire, and I then made some modifications:

1. I did not use an electric fuel pump so its relay was deleted.
2. The heater fan motor and brake lights had shared a fuse. I put them on separate circuits, making use of the fuse that had been for te fuel pump.
3. The horns had shown one wire from the fuse panel to one horn, and another from that horn to the other. As the TR3 does not have wires crossing from one side to the other at the front of the car, I ran separate wires to each horn right from the relay.
4. The kit came with a main power terminal where the yellow wires joined in a star configuration. Since the fuse panel is very close to the solenoid in my car, I used a terminal on the solenoid as the main power terminal. Then with one 8 gauge wire supplying one of the fuse blocks, the rest of the bus on that side of the fuse block is used to further distribute unswitched power to the switched power fuse block (via the power relay), the high beams, and the low beams.
5. Terminal 1 on the wiper motor is actually BY as there is already a BG being used to switch on the electric fan.