The BMW E28 automobile platform was the basis for the 1981 through 1988 BMW 5-Series automobiles. The European model form BMW E28 series range from 518 M10B18 carburetted, 518i M10B18 fuel-injected engine, 520i M20B20 early, fuel-injected engine, 520i M20B20 late, fuel-injected engine, 524d M21D24 diesel 2.4 L e ngine, 524td M21D24 turbocharged diesel 2.4 L engine. The following article apply for the 1986 BMW E28 524TD’ electrical system. Here you will find detail information regarding the service and troubleshooting procedures for 524TD electrical system. central locking, power windows and seats, sunroof, body electrical system, wiper and washer, instrument cluster, active check control, light switch details, headlight, fog light, hazard lights, stop and interior light, A/C temperature control, A/C blower control, radio, power antenna and audio system.