How do you re-key an ignition?

How do you convert 12 volts to 24 volts? There are two adjustment screws on the headlight for the Yamaha v-star 1300 what function do they perform? Should the rotor move under distributor cap? How do you start a car when remote key battery is dead? You just replaced the battery in a 99 cirrus but the battery light stays on? Where do you hook up the remote wire on your amp? Should you replace rotors at the same time as the brake pads? Fuse for radio in 2002 Chevy venture possibly blown which fuse controls this? How do you replace a speedometer cable for a 2003 Chevy silverado? You have an 1984 ford bronco tail lights and blinkers work but no brake lights you have tried fuses and the brake light switch but still have no brake lights? Where are the timing marks on a Mazda 1997 626 16valve or a diagram? Where is the IAT sensor located on a 1993 GMC sierra? Troubleshooting 1991 buick park ave eletrical when i turn the key to start the car the starter won't turn but when i gorund the two bolts on the solenoid it cranks? Is it safe to drive without a cover for a catalytic converter? How do you change mazda cx-9 key fob battery? What causes my automatic transmission to howl when put into gear? How do you remove a 89 civic bumper? Fuse box location for 89 Chevy Celebrity? What is the name of the air filled tire? What is the critical temperature for diesel fuel?