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85 Eldo Biarritz
806 Posts
I never heard of BCM in 79-85 Eldos. They only have ECM.
BCM is Body Control Module (in newer caddies).

Neither my 84 or 85 Eldos have a BCM.

The actual climate control and MPG display panels have some electronics in them, but they still get most of their data from ECM.

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