hi all. okay. one of my binnacle lights had gone out a week ago. one of the two (inboard) that makes your odometer readout illuminate, so half the mileage was dim while the other alight. therefore i prepared to replace the bulb per the writeup on the main page. so i'm driving home from work and it comes back on. which pleases me. but i notice the readout is subtlely pulsing and just noticibly getting brighter and dimmer rythmically. what's the deal? something loose? connector? a ground?