All. Thank you all for your calming words, and things to try. Replacing the harness is now on hold since I have been convinced this may be overkill! My current list of woes runs like this.... * LHS door lights don't work unless the key is fully in the ignition ** Ignition P1 Temp gauge records electrical system use as a running total. Put indicators on and the gauge 'bumps' upto to max. Use the lights and the higher the beam the faster the gauge moves. Eventually reaching the 'P' of 'temp'. Gauge does not zero by itself, but is 'reset' by turning to P2 **Ignition P2 Pre-start the oil pressure gauge oscillates ~30degrees when indicators/hazard lights are in use. **Once started the temp gauge still moves through ~30degrees with electrical load. Switching on main beam/air con shows a false sudden engine overheat condition. The gauge then drops slowly to 'normal' when the function is turned off. In all modes, the red warning lamps (handbrake etc) on binnacle and 'lock door' on centre console dim/flash with indicator use. No more than one function can be used at a time without knocking out the indicators. i.e. with fans/lights I get no indicators. Lights appear dimmed in all modes. Fuel gauge reads low except when in P2 pre-start. So far I have replaced the battery, fuses and installed a full relay replacement kit. The voltages measured at jump posts are within the manuals recommended figures. Continuity between the front ground point behind LHS wheel *appears* good (I'll recheck). Running an additional ground cable from that point to the enigne ground point doesn't make a difference. I was particularly interested in the post that suggested a screw may have gone through a cable, it's something else to consider! I will be removing the binnacle on Thursday/Friday, in the meantime any and all further suggestions are gratefully received. The LED pictures have helped, I should have looked there first, doh! John Chpaelhow MMG 287W : 'Boeing' #0737