ok seriously need help...

[CTScott]

Originally Posted by caineroad

I checked the seat heater connections (only two red and 1 black)

they look like new, not touching any bare metals.

But I realized the seat heater ground(black) is in the same chassis bolt as the reverse camera ground, does that going to cause a short?

The reverse camera power cables (+/-) and signal cable, with extensions, they all look fine... no burnt, or touching the chassis.

I want to unplug everything from the reverse camera and see if my gauge fuse still blows. But fuses are here are not cheap, is there anyway I can use a multimeter to test, instead of putting a new fuse in?

Grounds should all be "shorted" together.

If you have a multimeter that measures current (A), you could connect the meter leads in place of the fuse to see how much current is being drawn on that circuit. If you do not, disconnect the battery and measure the resistance (ohms) between one of the fuse holes (the little holes in the top of a plugged in fuse) and ground.