You'll be glad you did! If you're not confident that you can install the receiver correctly, have it installed by a qualified Blaupunkt installation technician. Use this receiver only with negative ground 12-Volt (11-16 Volt) direct current (DC). A quick-acting 10A fuse protects this receiver. Do not substitute any other type of fuse. During operation of the receiver, the receiver's sidewall may heat up considerably. Be sure to keep all wires away from hot parts of the housing. Do not damage the vehicle's battery, wiring or fuse box. Before drilling holes, look to see what is on the other side! Be sure to observe the safety notes of the vehicle manufacturer, such as those for airbags, alarm systems, on-board computers, immobilisers, and braking systems, etc. We recommend making and testing all electrical connections before installing the receiver. Connect the leads (wires) according to instructions below. Don't assume that a seemingly-matching wire harness in the vehicle matches the receiver's wire harness wire-for-wire. Make sure before you connect anything! Your Blaupunkt dealer may be able to sell you adapter harnesses for your vehicle, which can make connections much easier. Modification of this receiver or its mis-connection and/or mis-installation will void its warranty. · · · · · · · · · · ELECTRICAL CONNECTION INSTRUCTIONS A. Connect the Wire Harnesses to the Vehicle's Electrical System (See Fig. 4) To prevent short circuits or serious damage to the receiver and/or speakers: 1. Disconnect the vehicle battery's negative terminal before making connections...