Attention: TDR Forum Junkies 
A few years ago my 04. 5 overhead console started to act up. 1st the ambient temperature went to 130 deg, then the most of the trip functions reset every time the ignition was cycled. Shotgunning a new ambient sensor made no difference... . lacking time I lived with it. Then my windshield wipers developed some demon characteristics . . very unreliable on delay setting and they would cycle upon activating the keyless entry. The latter is a problem when there is 10" of snow on the truck! Again I shotgunned fixes by cleaning the multifunction switch and disassembling the wiper motor to inspect the park switch..... all made no difference.
Finally getting some time to investigate ... some simple metering of the ambient sensor circuit led me to the Integrated Power Module (IPM) and a discovery of advanced corrosion on the C3 and C4 connectors on the back. I turns out the WW circuit is also in these 2 connectors. Using this procedure http://www.dieseltruckresource.com/dev/power-distribution-center-pdc-repair-part-2-t222373.html the IPM was disassembled and repaired ... the C3 and C4 connector pins were the only things corroded in the IPM and I was able to find a donor (non RAM) IPM to swap pins out of. (BTW there is a MOPAR complete replacement for the IPM, swapping the pins was a lot of soldering) The connector assemblies were all corroded as well, beyond a simple clean and reuse. I found a MOPAR connector repair kit specific to the C3 and C4 connectors that had all the pigtails pre crimped for the repair.
One glaringly obvious detail is that these 2 connectors are the only ones on the back of the IPM that do not have a splash shield incorporated allowing moisture to start the corrosion process. After reassembling I sprayed the back of my connectors with dielectric compound to provide some moisture resistance.
So far . . the fix seems to be good although it is pretty dry here and the WW's usually act up in the damp conditions.
Hopefully this provides some insight, my "internet troubleshooting" led me to some simple inexpensive shotguns that I attempted for lack of diagnostic time, read many posts about some very expensive ones! This seems to be a very common problem that manifests itself in more that a few symptoms... in these connector circuits are also brake/tail lights, WW fluid controls, ignition on circuits, backup lamps and turn signals.
Finally getting some time to investigate ... some simple metering of the ambient sensor circuit led me to the Integrated Power Module (IPM) and a discovery of advanced corrosion on the C3 and C4 connectors on the back. I turns out the WW circuit is also in these 2 connectors. Using this procedure http://www.dieseltruckresource.com/dev/power-distribution-center-pdc-repair-part-2-t222373.html the IPM was disassembled and repaired ... the C3 and C4 connector pins were the only things corroded in the IPM and I was able to find a donor (non RAM) IPM to swap pins out of. (BTW there is a MOPAR complete replacement for the IPM, swapping the pins was a lot of soldering) The connector assemblies were all corroded as well, beyond a simple clean and reuse. I found a MOPAR connector repair kit specific to the C3 and C4 connectors that had all the pigtails pre crimped for the repair.
One glaringly obvious detail is that these 2 connectors are the only ones on the back of the IPM that do not have a splash shield incorporated allowing moisture to start the corrosion process. After reassembling I sprayed the back of my connectors with dielectric compound to provide some moisture resistance.
So far . . the fix seems to be good although it is pretty dry here and the WW's usually act up in the damp conditions.
Hopefully this provides some insight, my "internet troubleshooting" led me to some simple inexpensive shotguns that I attempted for lack of diagnostic time, read many posts about some very expensive ones! This seems to be a very common problem that manifests itself in more that a few symptoms... in these connector circuits are also brake/tail lights, WW fluid controls, ignition on circuits, backup lamps and turn signals.
