I just ordered this part from Terminal Supply and noticed that the module includes an optional wire connection to the crank switch. I just wanted to know whether you used it in your installation or grounded it as per instruction? Thanks.Following the supplied directions, the module was very easy to install. I mounted the module on the driver's side rail with a single screw in the engine compartment near the relay box. There are only (5) wires that are required to connect in the wire harness: BLACK to any suitable ground; RED to the positive terminal lug inside the engine compartble fuse box (which is directly next to the relay box). Referring to the factory wiring diagram, the high beam circuit uses a RED/BLACK wire and the low beam circuit uses a RED/PURPLE wire both of which are lcoated behind the driver's side headlamp unit. There is a wire loom which is easily acessible by removing the plastic fasteners and screws which hold the inner wheel wheel splash guard in place. Removal of the entire wheel well splash guard is not necessary. You only need to turn the wheel in to gain access to the area behind the headlamp unit. You need to cut back the black plastic wire wrap to expose these two wires which are contained inside a wire loom which goes to the mylar connector mounted on the underside of the headlamp unit. The WHITE wire of the module gets connected to the high beam wire (RED/BLK) with a supplied wire tap. THe ORANGE wire of the module gets connected to the low beam wire (RED/PURPLE) with a supplied wire tap. You can then wrap everything in electric tape to restore to factory standards. Finally after all connections are secured, the GREEN wire must to wired to a 12v source which is live when the ignition key is in the run position. I used wire tap on a suitable wire inside the aforementioned engine compartment fuse box which works perfectly and does not cause any excessive current draw as the GREEN wire is merely a sense wire for the DRL. The whole process should take you less than 45 minutes and will give you complete DRL functionality in compact installation and enable you to qualify for a insurance discount on your policy.