Originally Posted by rekab69
I have been a little lazy in tracing this fault by installing a re-setable trip fuse...
But it has now got to the stage where I need to find the chaffing in the loom.. Can anyone give colours of the cables I need to locate & narrow it down to chassis points as I had a look today and there are more wires in the areas mentioned that Battersea power station , which by the way is a disused power station in London!
Download the 2006 KJ Service manual here...includes the circuit diagrams:
I doubt you will be able to physically trace all the wiring to find any chaffing....other than behind the fuel head. The wiring takes a long loop around the whole engine bay and goes through channels below the radiator. Even if you are chasing a wire that goes from the fuse/relay box under the hood going to the ECM....a distance of about 18 inches...I can assure you it actually takes this beltway route of about 6 feet.....been there, done it, waiting for the T shirt!
You need to measure with a good Multimeter the suspect wires for their resistance going to ground....and being intermitant this may be a problem!. So you will have to isolate suspect wires on both ends by cutting them off at each end and replace that wire with a temporay length of wire....once you have found the failing wire...leave it in its harness and replace it neatly with a new one and return all your cut-off wires back to their original state by soldering them together with shrink-tubing insulation over the joints.