Never saw 1-4 light and shift light

[MuRCieLaGo]

Hi,

'91 ZR-1

Since I bought the car (2 weeks ago), I've never seen the 1-4 light/shift light while driving, except when I read the codes (they light up, so the bulbs aren't burnt). I drive the car at WOT pretty often.

Why?

PS: Very sorry for all the threads I've been posting lately. Got too much time to work on the ZR-1. Getting back on a ship in a couple of weeks so it's about to come to an end.

Thanks!