Done a power train swap from my 99 Dodge Dakota 5.2 liter magnum 4wd into a 2001 Dodge ram 5.2 4wd , now the computer is displaying no bus on odometer starter turns over put the fuel pump brand is not working. Replaced PCM and also replaced the #12 iod fuse that keeps blowing it's my dad's truck we've done plenty of motor swaps in dodges before , do y'all have any ideas

 

No bus means there is a problem on the communications bus. That can be minor, and just be annoying, or, it can take down the entire truck.... Usually, it's a bad sensor, or pinched wire somewhere. Crank position sensor, and cam sensor are both frequent victims of either damage, or pinched wires. At least here is more room in the Ram to get behind there and look.

 

Thank you for letting me know 🤠

 

Fuse 12 in the inside panel powers the underwood light, amongst other things. Assuming you removed the hood you might have a short somewhere now. This should be not be related to the "no bus" issue though. You probably can't talk to the PCs either, as HeyYou wrote trace all the sensor wires and make sure the engine has a good ground and the grounds at the front of the engine are connected. The PCM grounds there.

 

We double checked all the grounds and we replaced the I/O/D fuse . We now reset the odometer and it's flashing these codes

 

Those are cluster codes, nothing to do with the engine. Basically, they are telling you the cluster isn't getting the info it expects from the PCM...... Perfectly normal.

 

[img alt="What do these two wires go to ?
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What do these two wires go to ?

 

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Ground wires? Are there a selection of wires that go to a stud for the power steering pump?