Fixing up my late-grandmother's old 1990 LS400. The radio is flaky and often does not turn on. I have found on eBay some radios from 93 and 94 that appear the same (both are Pioneer). Are they electrically compatible? Can I buy a 1994 and plug-and-play with my 1990 LS?
I understand I cannot put a Nakamichi radio in it, right?
Thanks in advance