The Nissan Altima is a popular vehicle in the Infiniti/Nissan family. Owners of the Altima often require access to the battery or engine compartment, when they run accessory wiring from the cabin. Finding the stock wiring harness location leading into the engine compartment is the method that allows wiring with or without the presence of a clutch. Running wires through the Altima’s firewall, although challenging, is made easier when you know where to look. Tips Writer Bio