Finally replaced my latching change over relay for the head lights, got a second hand one for $15. Prior to installing it I had already noticed some oddities with the lights when power via other relays.
Thew new relay has some odd wiring left dangling from the Series2 car it had been cut from. pin56 had the main blue cable and the blue/red ones applied to it, the blue/white where on 56b (i think) and the other 56a (or b if it was then other way around then a) was unused.
Having recently posted about the little blue Dubilier diode for reducing radio interference I was bemused to find yet another of these little units attached between the 31 and 81 pins or the blue/black trigger wire and the brown battery cable. Any idea why someone might have done this? same reason as the one in dash, to limit radio interference from light? or as a diode.?
I at first connected the relay as per how it had been on my car originally with the previous relay and then when that didn't work I set it up according to the unusal wiring on the second hand relay I had brought.
Main issue I am having now is that while the latching dip stick set up works its not perfect. on low beam both head lights are on low beam all fine. When changed over to high beam the passenger side head lamp is on high beam while the driver side one remains on low beam and the 2 fog lights come on at about 25% of their full 'fog light on' power?? some wiring issue here, but where should I start to look for the problem.
Also I should note that the new relay had another odd wire, connected to the blue/white wires into either pin 56a or 56b was a thin white/blue wire similar to one that appears near the starter relay but is not used on the starter relay at all.