Hi. What year is your Ram? Have you tried anything yet? Do the turn signals work ok? Do you have a test light to do some testing?
If I would have heard back from you we could have diagnosed it together and saved you some money. A replacement IPM runs $450, but I've got a free repair that you can do yourself in less than an hour to fix this problem.
I'm in the midwest also, and I'm not happy with the weather situation either!
Yes, my repair is a permanent one.
I'll post the answer and then you'll have to pay a deposit to be able to view it. If you are happy with my help then clicking the Accept button will give me credit for my time.
After sending this post it will just be a few minutes and I'll post the fix.
Ok, here we go.
All connections inside the IPM are made by printed circuit board, no wiring is used. All connection between the front control module, the fuses and relays, and the connectors underneath is all done through circuit board. What happens is moisture coming through a vent hole in the bottom will cause corrosion on the circuit board which can cause circuits to open up. The most common circuit to have this problem is the park lamp driver circuit. The FCM turns on the park lamp relay by grounding a circuit through the circuit board.
The normal repair done on these is to replace the IPM, but as you've found it's quite expensive. What I've been doing for a few years now is opening them up, finding and repairing the bad spot on the circuit board with solder. Since it can be hard to explain I've made a short video showing my process, which you can view HERE.
Removing the IPM isn't hard. There is one 13mm bolt, one push pin to remove, then you'll slide it to the right to release it from the battery box. Remove the positive battery cable from it, pull it up and disconnect the electrical connectors underneath and then it's out.
To keep moisture out you can seal the holes on the bottom. You'll see a couple small square holes, you could seal these with silicone if you wanted. They're in place for venting though, so I'm torn as to whether this would cause heat buildup problems though.
Replacement IPM's do come with a large plastic shield to keep water from spraying up on the bottom.
If you do need more help you can come back and reply to this question at any time, and clicking the Accept button doesn't cut off communication. Good luck with it!
You have a 2002 Ram 1500, correct? If so then pink/violet is the correct color for the park lamp circuit. This is the color from the IPM to the left and rear lamp housings, front park lamps, and license plate lights.
The color you found was correct then. The 2004 truck does show a white/yellow wire as the park lamp feed.
I know the left rear park lamp doesn't work and the right one does. What about the front? Do both of the front park lamps work and we've just got a problem in the left rear and possibly the license plate lights?
That's great! I was starting to wonder if we still had more problems on the circuit board. Glad to hear you found it!