Hello. I am looking into the wiring loom of my 53 year old car and the fitness of the wires and connectors within. I have the two part loom that runs from the rear lights to the fuses under the bonnet out, and have been measuring the resistance of each line. Question is; what would be considered too high? A new cable of the same size and length gives me 0.7 ohms, but I am getting various readings up to 5ohms. I would presume that the higher the resistance the dimmer the light. So where should I draw the line and consider replacing with new wire? Thanks. Andrew