Well as for lead numbers, the MASSE contacts are pins 7 and 11 on the lower right connector to cluster.
My grounds match up, so i cleaned their attach points and will check fuses for illumination. I feel that there must be a hot wire in the ground circuit with a crosswire somewhere on the switches.
note the odd 4th switch taped in blue and spliced into the leads for the dimmer pot and intensive wiper push button
i think it may be one of these two, the dimmer pot or the washer push button, i have