Have a look in the owners manual, the original owner may have written it in there.
Or replace it with a modern one as the originals are rubbish. They really are. I replaced mine (which was the top of the range one with CD changer etc) with a cheap modern one and the new one is miles better.
In car audio has come a long long way in 25 years. I have kept the original in case the next owner wants to put it back in, it’s a 5 minute job.
|