Question about 1995 Dodge Ram
Truck ran fine. It just died and would not start. Checked the fuses and relays. Tested for voltage to coil, there is no voltage there. No spark to the plugs? Were does the voltage to the coil come from? Thanks..Vess
The power supplied to the fuel pump, ignition coil, fuel injectors and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD):
The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, the logic module cuts power to the ASD, which in turn removes power from the fuel pump,ignition coil, injectors and those parts of the power module. This causes the engine to shut down.
Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start. The ASD can be triggered by a broken wire or short in another place, e.g. the fuel pump. Hope this helps, and did you try to retrieve any DTC codes?? Be glad to help friend.
Posted on Jul 01, 2009
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Posted on Jan 02, 2017
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