Question about 2000 Dodge Ram 1500 Truck
The ASD relay is controlled by the PCM (computer). The PCM will shut the ASD relay off if it doesn't see a signal from the crankshaft position sensor. Check that sensor and the wiring from the sensor to the PCM.
Posted on Jul 16, 2019
There are 4 relays mounted on Drivers side fender under hood. Near hood hinge area. Counting from the front it should be the second relay. They are not always installed in the correct order. It should also be the smaller relay in size.
Posted on Oct 25, 2009
First check any ignition/fuel related fuses. Check to make sure you have 12 volts coming into the pump and coil. If nothing to the fuel pump replace the fuel pump relay - if you do have power to the fuel pump then replace the pump. If nothing is coming to the coil it is either an ignition relay or a wiring issue. If you have 12 volts to the coil but no spark then replace the coil.
Also the fuel pump/relay would not kill the coil.
Posted on Jan 21, 2010
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Mar 08, 2012 | Dodge Ram 1500 Cars & Trucks
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 idea is to shut off fuel
pressure and the ignition systems when the key is turned off to prevent
fires, dieseling, and other problems.
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, or if the turbo
boost pressure reaches and exceeds the over boost cut-off point, 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.
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