Category Archives: Automotive Diagrams

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GM Twilight Sentinel Circuit and Wiring Diagram

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GM luxury vehicles use a system called Twilight Sentinel. The twilight delay switch in  the headlamp switch assembly is supplied a 5 volt reference from the instrument panel integration module (IPM) as shown in below schematic. GM Twilight Sentinel Circuit and Wiring Diagram The IPM also provides ground to the… Read more »

Dodge Intrepid Starting System Wiring and Circuit Diagram

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The Dodge Intrepid (1993) starting system has the following parts and components: Ignition switch; Starter relay; Neutral starting and back-up switch with automatic transmissions only; Wiring harness; Battery; and Starter motor with an integral solenoid. These components form two separate circuits. A high amperage circuit that feeds the starter motor… Read more »

Charging System Voltage Loss Test Circuit Diagram

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Charging System Voltage Loss Test Procedures: Adjust load to rated alternator output. Record VB (Battery Voltage) reading. Adjust load to rated alternator output. Record VA (Alternator Voltage) reading. Subtract VA (Alternator Voltage) from VB (Battery Voltage). Loss not to exceed 0.5V. Proceed to positive and negative cable loss tests if… Read more »

2007 Chevrolet Tahoe Battery Parts and Components Assembly

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The 2007 Chevrolet Tahoe is equipped with maintenance free battery. The battery is completely sealed except for two small vent holes in the side. These vent holes allow the small amount of gas that is produced in the battery to escape. The battery has three functions as a major source… Read more »

Volkswagen Touran Exterior Light Control Wiring System

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Volkswagen Touran Exterior Light Control Wiring System. Volkswagen Touran onboard power supply control unit (located on the left underneath the dash panel where it forms a unit with the relay carrier) evaluates the signals directly from the light switch. The onboard power supply control exterior light with bulb monitoring In… Read more »

Audi RS6 Fuel Pump Electrical Wiring Diagram

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The Audi RS6 (2003 model year) engine control module monitors the connections to the fuel pump control module. The fuel pump control module monitors the connections to the pumps and transmits the output voltage values to the engine control module. These values are monitored for plausibility. The following schematic illustrates… Read more »

Daewoo Espero Audio Stereo Wiring System

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Daewoo Espero Audio Stereo Wiring System. When you switch is ON your Daewoo Espero radio, an auto antenna inner relay is operated by 12V power supplied from radio terminal 4. At this time, because a contact point of "C" is connected to "+", and a contact point of "D" is… Read more »

1993 Toyota Pickup Air Conditioning Electrical System Wiring

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The 1993 Toyota Pickup air conditioning electrical system consists of battery, ignition switch, heater relay, blower switch, heater, blower motor, low pressure switch, A/C switch, A/C amplifier, thermistor, and magnetic clutch. The following figure illustrates the 1993 Toyota Pickup Air Conditioning Electrical System Wiring. Compressor draws off gaseous refrigerant from… Read more »

Lexus IS200 ECU-EFI Power Source Circuit and Wiring Diagram

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Lexus IS200 ECU-EFI Power Source Circuit and Wiring Diagram. When the ignition switch is turned ON, battery positive voltage is applied to terminal IGSW of the engine ECU and the EFI main relay (Marking: EFI) control circuit in the engine ECU sends a signal to the terminal MREL of the… Read more »

Datsun 280Z Body Electrical Wiring Harness

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Datsun 280Z cable used for body electrical wiring are low tension cables. They are covered with color-coded vinyl for easy identification. Each system (e.g. ignition, lighting, or signal system) has its own distinctive color. The entire wiring system consists of several harness connected one to another by means of connectors…. Read more »