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Where is the ASD relay located on a 1990 Dodge Power Ram W250 4X4 with 5.2L V8? My truck shut off momentarily, but I was able to restart it right away. Has be running fine ever since. Code was "open circuit to Auto Shutdown Relay. Should I just replace the relay, or is there a more important problem I should address?
Thanks,
George
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On a 1997 Dodge Ram Van, the relays that are located on the firewall are likely to include:
Fuel pump relay
Headlight relay
Horn relay
AC compressor relay
Engine control relay
Automatic shut down relay (ASD)
These relays are responsible for controlling various electrical components on the van, such as the fuel pump, headlight, horn, and AC compressor. The specific location of these relays on the firewall may vary depending on the model and trim of the van.
If you are having an issue with one of the relays on the firewall of your 1997 Dodge Ram Van, it is recommended to consult the service manual or a mechanic to determine which relay is causing the problem and how to fix it.
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.
Dodge does not use a fuel pump cutoff switch, that is Ford and Mazda, and that is is on triggered on impact that exceeds 3 G's. You have what is called and ASD fuel pump shut off relay, it is also triggered in a crash. The ASD is locate in the underhood fuse and relay center. Refer to the owner's manual for location.
You have fuel,As long as you can hear the pump come on this is a good sign,the ASD relay works, The ASD relay power the fuel pump the injector the power to the coil,The primary signal for spark is the crank sensor the location is behind passenger side cylinder head its is a three wire connection.This is your solution
I would start with the auto shutdown (asd) relay it is located in the power distribution box it may have corrosion or pcm could be bad it needs to be tested it connects the fuel injectors, o2 sensor and ignition coil if the pcm dont detect a 12 volt from the asd relay it will shut off.
The pump relay should be there also. Check your fuse panel in the truck though.
Fuses, Relays & Circuit Breakers
The fuse panel box is to the right of the glove box with the glove box door opened or beneath the instrument panel (dashboard) on 1989-93 models.
Pull out the fuse panel for access to the blade type fuses
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