FIELD: mechanical engineering; internal combustion engine; engine condition checking appliances. SUBSTANCE: device has pulse light source in form of parallel-connected light-emitting diodes and control circuit with switch, ripple filter and pulse shaper. Light-emitting diodes and control circuit are enclosed in dielectric case. Device supplied with 5-17 V has two wires one of which is connected in operation with output of engine ignition system switch, and the other is connected with automobile frame. EFFECT: reduced overall dimensions and weight of device, reduced power consumption enhanced reliability and safety in operation. 2 cl, 3 dwg
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