Fault codes

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careytwin

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Location
UK
Ram Year
2011
Engine
Hemi 5.7
Is there any auto electrician's in the group? Needing some help with fault codes P0688 P0882 U0401
Truck will not start!
2011 Ram 1500 5.7 4x4
 

chri5k

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Diesel
All 3 codes are related to power to the Powertrain Control Module (PCM). There is a relay in the TIPM that supplies power to the ECM and PCM. Check the relay and the wiring on the underside of the TIPM. Also, check the wiring harness from the TIPM all the way to the transmission.
 
OP
OP
C

careytwin

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Location
UK
Ram Year
2011
Engine
Hemi 5.7
I've checked the PCM relay its getting battery 12v on one side and 12v on the other side dropping to 5v when the ignition is turned on.
Can't find much information or electrical drawings for the truck but i think that is correct?
Out of ideas of what to try next .
 

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