Quote:
Originally Posted by bbarcher
If the light comes on as soon as you start up, before rolling, there is probably some type of wiring fault affecting a speed sensor wire somewhere.
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There are three versions of wiring with respect to start-up: 1) the light comes on and stay on until you are traveling about 5 mph; 2) the light comes on and goes off once you hit 10.5 volts; and 3) the light immediately goes off once the engine is running.
Dropping below 10.5 volts will trip a fault.