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Adding mirror with compass option ...
to my 1991 caprice which already has the map light mirror option. I thought I could just plug in the new mirror and go, but it doesn't seem to work that way. Actually it wasn't a new mirror, it was from the wrecker off a 91 caprice, but it looks to be in excellent condition. Wiring harnesses for both mirrors have four wires going to the plug. When I hold down the button for three seconds on the compass mirror "CAL" is not displayed as instructed in the owners manual. Do I need to activate something in the computer to get this to work, or have I missed something? Any help would be appreciated. Thanks. Tom
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1949 Chevrolet 1433 (Canadian 1 ton cab and chassis single rear wheel pick-up truck)
1968 Pontiac Parisienne (rust free survivor)
1973 Buick Centurion (four door hardtop; engine will be donated to our 1949 1 ton truck)
1989 Chevrolet K3500 RC/LB (454 & single rear wheels)
1991 Chevrolet Caprice Classic (police cruiser clone)
1992 Chevrolet K2500 EC/SB (almost rust free daily driver)
1998 GMC C1500 EC/SB
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