Crimp on 2 electrical connectors that will attach BAT to A. Then, cut a piece of the 14 gauge wire so that it fits between the alternators BAT terminal end and the end that is marked with an A on the battery isolator. Be sure that they are secure and tight when you are hooking them up. This is where all of the wires from the BAT terminal that you just connected are going to go. Look for the terminal on the isolator that is labeled 1. All of these wires will need to be disconnected. Next, check for the wires that are attached to the BAT terminal, which will be located on your alternator. Then, take the negative cable from your actual car battery and remove it. Keep in mind during this step that you have to disconnect the negative cable before you attach the positive terminal to anything so that you do not get shocked. Once you have hooked up the isolator you can do the actual wiring. Again, hold it on tight so that you can secure it completely flush with the frame. Carefully drill around the isolator attaching it to the frame with the sheet metal screws. You may want to have another person help you with this step to hold down the isolator securely as you drill. Be sure before you do any installation or securing that you can close the hood with no problem and that all other parts work without disruption. This is typically done in the engine compartment and needs to be hooked up to the actual metal part of the vehicle. Now that you know whats going on under the hood, you can install the isolator. Then, once the car is ready to be worked on, you will want to check out the manual just to familiarize yourself with everything that is going on so you know where to look. You do not want to be working in it and then burn yourself or cause any electrical damage. Then, allow the car to cool completely for about 20 minutes or so, especially if you were just out driving. This is an extremely important step so that you do not do any damage to the car and more importantly, to yourself. Begin by making sure that the car is turned off.

How To Install A Battery Isolator Relay