Over the 140+ hours I've flown N122B there have been few problems. One of those was an intermittent electrical glitch which caused the Lane A fault indicator light to stop working at 100 hours TT. Trouble shooting revealed a blown fuse (associated with indicator light circuit) in the Rotax engine fuse box. I was unable to find the cause of the blown fuse, but on replacement, everything functioned normally. At least until 140 hours TT, when the fuse blew again. At this point I decided to ground the plane until the underlying cause was identified. This time around, trouble shooting included wiggling all the wire bundles containing leads to the indicator light. Manipulating the wire bundle between the ignition and HIC modules blew the fuse again, suggesting the cause was an intermittent grounding of the power lead. Tracing the wires, the cause was identified (chafed area touching an avionics support, grounding the power lead; see pic below), and repaired. Sometimes it's the little things!