light goes on and off

on my gt, there is a orange light, is the last one in the instrumental panal, its kinda hard to describe, it looks like a battery but that light is the first one. it goes on and off. can any tell me what that light might mean. thanx alot

Is there no description of it in the owner's manual?

i bought the car used, it didnt come with one

What year is the car?

the year is 1998 gt

off topic, but still interesting - is there any way for me o install one of those light boxes for my lx? i notice a lot of wire harnesses that aren't connected to anything, is it right to assume that all i'll have to do it yank one off of a junkyard gt and install it in mine?