I'm lost i cant find a hole in my ford c-max firewall to install my power cable for amp can someone help me as i am traveling this sat to France by car .
In most vehicles there are spare holes filled with rubber plugs. Pop one out with a screwdriver and make a hole in plug a little smaller than the size of the wire for a very tight fit. If it's a smaller size power wire, it can sometimes be run through the same grommet as the vehicles main harness. Be very careful not hurt the existing wire. I have seen people get careless and screw the harness up and it's not easy or cheap to fix. When doing this I usually use a stiff wire (a small diameter yet long screwdriver can work too) and slide it through the grommet. I then use electrical tape to secure the power wire to stiff wire and pull it through. Make sure your penetration point is still leak proof after doing this. You may need to use some silicone and or electrical tape to seal it up.
