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hi ive got a standalone rev counter but have no wiring instructions with it i know two wires are red and black are for the lighting .. but there are 3 more wires red green and black ?? anyone got any ideas thanks :eek::eek:
 

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hi ive got a standalone rev counter but have no wiring instructions with it i know two wires are red and black are for the lighting .. but there are 3 more wires red green and black ?? anyone got any ideas thanks :eek::eek:
Is this rev counter for a petrol or diesel?, is your van petrol or diesel?

Usually it will be:

Red: Ignition key switched live
Black: Chassis Earth
Green: Ignition Coil or Alternator tachometer output (Depending whether petrol or diesel)
 
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