Why would fuse number 9 keep blowing instrument cluster lights up but no tach speedometer etc.?

Answer 1

ANYTIME a fuse "blows out," and ESPECIALLY if it continues to do so when replaced,indicates a serious electrical problem. Fuses are designed to "blow" for one reason, and that is to protect the conductors [wires] in that circuit from damage or from the possibility of igniting a fire due to an overload or SHORT CIRCUIT. If you have not added more "stuff" [like sound systems, etc.] to that circuit, then the problem is not an overload, but a SHORT CIRCUIT fault. The fact that your "number 9" fuse continues to blow when new ones are installed is a clear indication of a SHORT fault in THAT specific circuit. The fact that the instrument cluster lights up indicates that it is not on that circuit [# 9 fuse], and is therefore immaterial to finding a solution to the problem. The fact that the tachometer/speedometer DO NOT work tells us that the SHORT is somewhere in the wiring, instruments, or devices IN THAT circuit. In order to correct the problem, is necessary that you FIND the cause of the SHORT circuit, and eleminate it. Then, a replacement fuse should not blow, and the instruments/devices on that circuit will again work. Good luck ! j3h