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Wheel change
Save Energy

Video Transmission
Video Gearbox-gripes
Video History 1
Video History 2
Video Var. Speed Gearbox 1
Video Var. Speed Gearbox 2
Video Var. Speed Gearbox 3
Video Var. Speed Gearbox 4
Video Var. Speed Gearbox 5
Video Light commercial veh.
Video Shift Possibilities
Video Gearshift Lever
Video Transmission (truck)
Video Ecosplit Gearbox
Video Gearshift (truck) 1
Video Gearshift (truck) 2
Video Truck Multi-axle Gearbox
Video Group/Splitter Gearb.
Video Gearbox Lubrication
Video Axilliary Drive
Video Retarder 1
Video Retarder 2
Video Retarder 3
Video Overdrive
Video Synchronising 1
Video Synchronising 2
Video Two-Shafts Gearbox
Video Gearbox (de)mounting 1
Video Gearbox (de)mounting 2
Video Front - Cross-engine
Video 3 Shafts (not coaxial)
Video Gear Shaft
Video Transmission Design
Video Tractive Power
Video Direct Shift Gearbox 1
Video Direct Shift Gearbox 2
Video Direct Shift Gearbox 3
Video Form. 1 Transmission
Video Motorcycle Gearbox

Video Transmission Ratio
Video Three-shafts Gearbox
Video Two-shafts Gearbox
Video Gear Spreading

Video Manual Gearbox 1
Video Manual Gearbox 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  Parallel connection


The parallel connection is - as opposed to the serial connection - by far the absolutely dominating method as far as switching in motor vehicles is concerned. Almost all the consumers are switched parallel. Earlier, the fuel injection valves and glow-pins (also called glow-plugs) were switched in series, nowadays both are parallel. Even in trucks, where a 24V circuit exists and where 12V systems have had to be connected, this cannot function with a simple serial connection. This equipment is also - with a special transformer - switched parallel.


Important for the parallel switching is that everything has the same voltage of 12/24 volt. The current divides itself, and thus the, to be calculated, current strength. The quantity of power taken by the parallel switched consumers is added together. That means, (theoretically) that one 5W- and one 21W-lamp, see the above diagrams, can be replaced by one 26W-lamp. Should you be interested in the calculation of a replacement resistance, please click here.               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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