Hello
The wiring diagram (Advance Autowire) and (Haynes not so clear) show instrument lighting for 8 instruments - I have only 6 -Oil, Fuel, Temp, Ammeter, Speedo & Tacho on my 4a.
Are the diagrams wrong or am I missing something?
Thanks
Keith
They should not be on the same wire as the panel lamps, and the ignition warning lamp has a different bulb holder.
I have attached the wiring diagram that I created for my TR4A's wiring after converting it to use an alternator, which may help.
(I found other diagrams were not necessarily correct and some were downright confusing).
TR4A_wiring.pdf