there is a grey wire and a black wire to a little dash bulb going to the top of the fuel guage in the dash carrier. My question is, can I just splice in an additional grey wire to the grey original and black to the black and put an another bulb in (in paralell I think ?)like that bulb on that same circuit without any problems ( too much on one circuit, etc)? I want it to go on the same time the fuel light guage bulb goes on.

I have added my triple gauge lights, tach light, and the radio light to mine. The dimmer doesn't even get warm.

I've added a total of 7 aftermarket guages, plus replaced all the bulbs in my dash cluster with 7 watters instead of 4 watters. Dimmer still works fine.