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Q:

fuse/wiring on 1993 Buick Roadmaster

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
how cani access the wiring to the odometer/speedometer and voltage guage ?
(1) Answer
If you remove the "gauges cluster" there is an electrical connector that plugs into the cluster. That would be the best place to test electrical inputs to the cluster.