Installed new in tank electric fuel pump. When running wires in engine bay (I was looking for a keyed power wire for relay) I noticed my ballast resister was getting very warm; almost too hot to touch. Is this normal? Key was in "on" position for less than 10 minutes, probably about 5 but less than 10. 6.4 volts in and 10.5 volts out if that makes any difference.