Recently I have replaced the IPDM on my 03 G35 Coupe, after doing so the windshield wipers on my car now don't stop. I can't change speed of them I can't do anything. I can only pull the fuse and hope it doesn't rain.

My TL 10amp fuse in IPDM also keeps blowing as soon as I connect the battery, but lights work just fine.

I did replace the IPDM again just to see if that's the issue. ( first 2 ipdms didn't have this problem but tail lights wouldn't work, these last 2 allow the tail lights to work but wipers won't stop.

I'm lost and don't know what to do. Anything helps!

I have replaced the IPDM
I Have replaced the clock spring in steering wheel
I have replaced the wiper control switch in steering wheel.

 

Have you been able to source the exact part number for these replacement IPDMs? I suspect things changed from year to year.
If you don't already have it:
https://www.nicoclub.com/service-man...F2003%2Fpg.pdf
There's your FSM for Power & Ground circuits. (Scroll down below the viewing window and you can "click here to download a copy"). With some reading you should be able to trace things as they run through your IPDM. At first glance it looks like there are two relays for the wipers - one for hi and one for low. And both fuses 74 and 80 are involved as well as the rear window defogger relay? I'd need to study it more to try to figure out that circuit but hopefully this will help you find the problem.

 

yeah I have the exact model number. It ends in 500 I had previously bought a 505 and figured that was why.

I would take it to a shop but I tried that for my tail light issue.... wasted 400$ because after 2 weeks they couldn't figure it out. I told them it was ipdm so I just paid them took it back and replaced it. No one around here is Infiniti experienced sooo here I am learning.


before the IPDM replacement the 10amp tail lihht fuse was not blowing and I didnt have this wiper issue. This only came after I got a good IPDM. Unfortunately i have no idea what wires were messed with when they had it at shop for 2 weeks.

 

Huh, weird stuff you are chasing. I would have guessed the ...505 part was the right one based on ebay's compatibility grid. ...500 only lists Nissan Altima. And a NEW controller board for an 03 coupe shows as part number 284B7-AL51B - but it costs a bundle.

Why are you needing to replace the original IPDM? Did it get wet and corroded? (Just a guess).

In this screenshot of a portion of the schematic you'll see that both the wipers and the rear lamp relays connect to a CPU within the IPDM. Obviously every wire needs to correspond correctly to your original IPDM so it seems something is wrong at this point in the circuit. I'm sorry but I don't know how to help you proceed.

The most important thing to get working is your taillights so I hope you can figure it out... And before it starts raining too.

 

See that's the thing though. my tail lights and blinkers ALL WORK FINE.

And 500 was what I bought the car with. Worked perfectly.... till it rained and I had the ipdm cover off. Bought a replacement from junk yard but that had bad fuel pump relay. BOUGHT ANOTHER ONE and then got this windshield wiper issue. So i just figured it was a string of bad luck and bought another. Same issue which means to me its no longer and IPDM issue. It's based somewhere else.

 

Ah, your original got wet, understood. I'm pretty sure you can swap individual relays in and out of these IPDMs so what about replacing the bad fuel pump relay in the 1st IPDM you tried? Did other things work ok with that one? Maybe you can build one good IPDM out of the 3(?) that you have now. Just an idea.

If your fuse #75 is blown your rear lamps (parking lights) and side markers should not still be working. There shouldn't be any power running through that relay and energizing that circuit so that's a bizarre result. Turn signals and stop lamps are different circuits.

Do your IPDM connectors and related wiring harnesses look ok? Any water damage or corrosion?

Hope you can get it all working.

 

no everything looks fine.. it's just going to be a day of figuring out which wires I need to chase down. Car drives fine. Just annoying not having any wipers

 

You wouldn't happen to know off hand where the cable is ran?

I found out last night I actually don't have running Tail lights. I HAVE Brake lights and blinkers though.
and reverse lights

 

I'm trying my best to follow your entire story but above you wrote: "...Bought a replacement from junk yard but that had bad fuel pump relay..." Do you still have that first IPDM? Because, as I mentioned, you should be able to replace or even temporarily swap individual relays. If everything else worked correctly with that particular IPDM then you may be able to revive it or at least make one good IPDM from the two or three that you have now.

Brake lights and blinkers are separate circuits. But the wipers and rear running light relays specifically run through that portion of the schematic pictured above which makes me wonder if there is something different about the pin-out of the IPDM you have installed right now....? The blowing fuse points that way too.

 

Well that relay isn't interchangeable its inside the IPDM, I can post pictures when Im home, but its wired to a circuit board and you cant really change them without breaking the IPDM, and I'll write it out clearly I know I'm being a mess.


Original issue: No Rear Blinkers, Clock Light Out, No Back lighting on any buttons
Bought a Junkyard IPDM which fixed my Blinker issue only however it wasnt pushing power to the fuel pump
Bought another IPDM Off Ebay, Fixed my blinker issue, however now my wipers dont stop working and 10amp fuse for tail light blows immediately, figured that was broken so I ordered another one
2nd Ebay IPDM came in, SAME issues, From this id assume its no longer an IPDM Issue but not its a wiring, ECU issue
It wasnt untill last night that I realized I had No running tail lights or License plate light

To answer your other question, Yes I still do have 2 bad IPDMS they are apart, in pieces ( the way they designed these is awful) when im home I can send pictures if you'd like) I took them apart to figure out how these things work.

Edit: Forgot to mention, I have replaced the Clock spring, and both wiper and signal switch on the steering column

 

Thanks for the summary, that's a bit clearer.

I am not an expert, just trying to help with my limited understanding of electronics and my ability to somewhat decode the FSMs. Looking at your original IPDM and the 1st replacement you bought, do they look like the first picture below? Note what I marked as the Fuel Pump relay. The 2nd picture below is from an IPDM I replaced in our '05 G years ago. As you can see, I've simply pulled out one of the relays. It was in there tight but it did come out. So are you SURE you can't do that with your '03 IPDMs? If you find the relays do come out then you can probably cobble together a working module.

 

Okay so I found this. Once i fixed this wire Im back to my original issue

This is my original issue. When I turn the right blinker it bleeds over. However if i put that wire back and tighten down the tail light it doesnt bleed i just lose my running tail lights