car: 1984 W126 300SD

this has been bugging me for a while. back a couple of month i installed a new radio, i probably didn't do anything wrong because i have done several installations with no problem.

but after that i noticed i don't have any dash lights anymore (instrument clusters, and buttons on the heater controls themselves)

now the fuse is good, i changed it just in case. is there another fuse that might have blown somewhere? all my guages still work fine.

thanks for all your advices

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198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05