Wiring A Car Fuse Box. Unplug the safe box by unclipping it. Step 3 - Begin routing the power cable.
Step 3 - Begin routing the power cable. In this case the fusebox is easily accessible below the steering column behind a removable panel. The PMP requires an ignition wire from the new fuse box a ground and a constant power wire which i was planning on running directly from the battery.
Connect the negative wire of your multimeter to your cars body set it to 20V DC and measure the voltage of both pins.
Buy Relays Pigtails and Kits HERE. See below for an example of a relay wiring diagram. Note that only one wire power wire can run a few circuits on the fuse panel. Disconnect the negative battery cable.