How to Add a Circuit to Your Car: 8 Steps (with Pictures) In this instructable I want to show you how to properly add a new circuit to your car using an add-a-fuse-adapter. ( in this case from the fuse box to your grounding) U : if you get frustrated). Protect your car with an old towel and carefully hammer onto the thread several times while pushing the wrench upwards. Eventually it will come Adding an Auxiliary Fuse Block to a Vehicle Adding an Auxiliary Fuse Block to a Vehicle Written by Mark Sound Monday, 10 January 2011 23:53 This will explain how to add an auxiliary fuse block to any vehicle. I have added this to several vehicles for various purposes and occasionally added multiples to one vehicle. The most common use for a fuse block is creating a convenient and safeTrucks · PDF · Shows · Sputnik Off Road How to add an on/off switch to kill a fuse on demand in Mar 11, 2018A remote controlled relay can be installed to trigger the fuse being blown or disabling certain vehicle functions. Similar to when an alarm is triggered disabling the ignition, etc. of the car. A 12 volt relay can be used utilizing a normally cl..