Dodge Ram 1500 / 2500 / 3500:

1990 Dodge ram 250 5.9-liter no start

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#1 9/17/2009 10:20 PM

bhogan
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Registered: 9/17/2009
Posts: 1

1990 Dodge ram 250 5.9-liter no start

I have a 1990 dodge ram 250 5.9ltr with a no start concern. I have no spark or fuel pressure no power to coil or fuel pump, I have no control signal to my fuel pump relay. I have access to Alldata and have followed the wiring diagrams, have power and ground to the sbec and the fault is pointing towards the ASD relay. The problem is the location Alldata is showing for this relay is not accurate and I cannot find it anywhere. I am also an ASE master with the extras (L1) but very little experience with this model. I would sure appreciate some info if anyone could help.

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#2 9/17/2009 10:51 PM

way2old
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Registered: 9/17/2009
Posts: 30

Re: 1990 Dodge ram 250 5.9-liter no start

The relay should be located on the drivers fender.  They may be back behind the hinge mount or just to the front of the inner fender center.


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#3 9/17/2009 11:07 PM

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Registered: 9/27/2008
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Re: 1990 Dodge ram 250 5.9-liter no start

https://www.realworldautomotive.com/forums/uploads/thumbs/2_shut-down-relay.gif

Here's the diagram I came up with for the location of the Auto Shut Down (ASD) relay. It looks like it's the small one, third from the firewall, on the driver's side.

The lack of power to the pump and ignition coil is definitely pointing in this direction. If you can't find the relay let me know and I'll see if I can find another view.

Keep in mind that you will only get power to the pump and coil for 2 seconds once the ignition is turned on, and constantly while cranking. After that it stays off without a signal from the distributor.

I spoke to a Chrysler buddy of mine on a similar issue and he said the Single Board Engine Controller (SBEC) was a common failure. So check for a ground at the relay from the controller while cranking.


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#4 9/17/2009 11:08 PM

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Re: 1990 Dodge ram 250 5.9-liter no start

Hello way2old, Thanks for visiting!


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