Well, I finally got around installing that after-market receiver (Pioneer)
into my neighbor's '94 Accord EX and that's when I found out that the old
factory radio did indeed have anti-teft protection. Luckily, my neighbor
also told me that because she needed the code before when the battery
was replaced, she wrote it down for future use. So that issue is settled.
Interesting though why Honda bothered with two different kinds of
receivers (for LX & EX) with the code feature being the only difference.
I guesss they wanted to justify the higher price for EX even though the
engine itself should have justified it alone, IMHO.
Oh, that old radio also had a blinking red light, typical of car burglar
alarms even though I didn't see any alarm installed that needed some
remote. Maybe the blinking light was meant to discourage burglers who
associate it with full-fledged security system.
BTW, the Crutchfield installation kit with the factory type pocket made
the Pioner receiver a real nice fit and it also looks good.