The Traffic Accident Reconstruction Origin -ARnews-

Re: Speedometer Locked in Position Following a Collision

Alan 'Cloggy' Moore (A2674254@infotrade.co.uk)
Sat, 14 Feb 1998 19:17:09 -0500 (EST)

I agree that it would be unwise to rely on marks made by the needle during an accident. However one accident I reconstructed involved a Vauxhall Vectra which has an electronic speedometer with a rotary needle. Various electrical circuits had been damaged in the frontal impact and the needle had come to rest at about 45 m.p.h. The vehicles dashboard and instrument housing was undamaged. Enquires with Vauxhall showed that the speedometer is operated by a form of stepper motor. It is a possibility that if power is cut the needle may stay in the position, that it was in, at that time the power was cut. When time allows I intend to do some trials to test this theory. Has anyone one else come across this ?.
Alan 'Cloggy' Moore
A2674254@infotrade.co.uk

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