I have just been poking around cleaning terminals on the back of the instrument display in an attempt to fix a sticky fuel level display needle when I came across this (see pictures below) on the plastic PCB behind the clock. It looks like one of the tracks has been cut/melted, perhaps intentionally, and I just wondered if anyone could identify what circuit it is on? On the PCB it is identified as being track no.7 but I have no idea what it does, and whether or not it should be cut? I have an 'early' instrument panel with speedo on the left and clock on the right (no tacho). The part of the PCB in question is to the right of the clock, next to the main 14pin connector.
Really!! That's weird though as the fuel gauge is working again now?? I can't say for sure if it is perfect as I know the tank is pretty low so the needle is only moving just out of the orange reserve level. But I would have thought that if the track was cut like that then the gauge wouldn't work at all??
Fantastic! Very helpful thread ZsZ. Thanks very much for finding it for me. I've never soldered a flexible PCB before, only a traditional plastic one, is there anything I should be wary of, other than using low temp solder & iron?
Re the soldering, just keep the soldering iron on the joint for the minimum time. If you are soldering a wire on to bridge the track, I like to fix the wire to the pcb with a hot glue gun or similar after soldering, so the joint isn't under strain.
Thanks very much to your good self for your help.