Can anyone point to which of the many pins on the 1988 S4’s instrument cluster’s four connectors are the ones to which power and ground should be fixed in order to test the illumination lamps circuitry without having to reinstall the cluster? Testing individual bulbs is not the goal at this point. They’re all fine and make good connection with the panel. But the LED replacement write-ups I’ve seen don’t indicate the panel polarities on pre-1989 MYs, and I need to see whether the new bulbs’ polarity as installed is correct for the circuitry in the panel.
Any suggestions are most appreciated.
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LED replacement - Power and ground pin connectors for 1988 instrument cluster
08 Jul 2020 21:42 #21354