Bill and Sandy,
For those reviewing this thread who may not have known, those four dash lamps used back in the day were blue, red, green and white.
During a conversation with a good friend the other day, this very topic came up. While we agreed on the functionality of the blue (hi beams), red (ignition) and green (turn indicator), we only had a strong suspicion that the white dash lamp may have been related to the radiator fan circuit – but we aren’t 100% sure.
Would anyone care to confirm?
T.