I've just replaced the old tail lights on my 1993 Triton ute with LED ones. Now I have the issue where the indicators flash at such a high speed it may as well not be flashing at all. If I put the hazards on, they all flash, although at a faster speed than usual. I've come to the conclusion that the flasher circuit in the old truck must somehow use the resistance of all the lights to determine flash speed and as there is still some of the old bulbs at the front, when they're all on, it works... but when it's just one side, the resistance isn't enough.
Does anyone know if I am correct in thinking that and if so. How would I go about fixing it?