i found the grommet
but i dont know how to put the wire go thru...

how do i do it ....

 

Fit it through the hole or make a slice in it and slide it through. I assume you're talking about the grommet in the firewall.

 

so u cut it ??

 

Drill a hole through the rubber, big enough for the wire, without hitting the metal. Or you can try to cut a slit and wedge it through, although that's not as clean, imo. Of course you could also route wire under the car and drill a hole wherever you want to enter the car, using a grommet there so the wire is protected.

 

A more non-intrusive way is to take a wire hangar and feed it through the hole, then tape your wire good and tight and pull it back through. That's worked for me in the past.

 

i do a combination... slit hole... feed coat hanger or something else.. and feed it thru