What is the best way to access the inside side of the heater hose grommet? I want to run a wire through there but i don't want to tear appart unneccessary parts of my interior.
I'd run either a long thin screwdriver or a length of 5mm dowel down alongside the hose where it goes thru the firewall. Then have a look up where the pedals hang and you will see what's been pushed thru - then just tape whatever to it a pull it back out.