Question about 1990 BMW 525i
You probably blew a fuse of knocked out a wiring harness during the install. Check the fuses first, if you don't see anything blown pull the radio back out and be sure all the wiring harnesses in the area near the radio are secure.
Posted on Jul 30, 2013
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Posted on Jan 02, 2017
SOURCE: 1990 525i bmw problems
Here is a thread I found that has a few suggestions that appear relevant:
If you find a solution there post it here for the next BMW owner with the same issue!
Posted on Dec 18, 2011
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