All. Further tests/symptoms now as follows. 1. I have discvoered that my battery cutoff switch doesn't! With the switch attached to the +ve terminal and in the off postion (key removed) there is still 0.5v measured against the -ve terminal. Just to make sure I pulled all of the relays except the main/accessory/RPM. Fan fail and all others disconnected. 2. As stated before the binnacle has been removed. To this pile of removed bits I have added the panel that holds the indicator relay/windscreen wiper control/buzzer logic box. The plastic relay holder for the indicator relay had snapped where the screw holds it down. 3. The large black cable which attaches to the panel described above appears on the wiring daigram to be a ground point, this makes some sense to me. If not the following 'problem' may be irrelevant! With either engine block or the front wheel ground point as the reference point for my voltmeter, I get continuity signal to this black wire only if the battery is disconnected, when the battery is connected continuity is lost and a voltage difference of ~0.5v is detected. I found that if I removed fuse 12 (courtesies/door lights) continuity was restored until the ignition swtich was turnedto P1 when continuity is lost again. Voltage was detectable ranging upto 0.7v. 4. As a second test the now freely dangling indicator relay unit was measured, the black ground point shows the same symptoms as above. 5. The LHS steering stalk control wires were disconnected. Now the main light swtich still worked but only alllowed side lights to be turned on, main beam was not selectable. As stated previously in all modes the 'door lock' / Aircon illumination lights 'flash' with the indicators. I am assuming that if these are still misbehaving if I were to reinstall the binnalce the gauges would also still fluctuate. Suggestions? John Chapelhow DOC 19 : 'Boeing' 0737