Hi guys, just got a 92 Dakota with 60k miles and it's doing the thing where it seems to run fine, but just dies after a few minutes. No check engine light, just the oil light comes on, and its not running long enough to overheat. I have the fuel injected 3.9, non magnum I believe. I keep reading that there is a 3 wire power splice, under the fuse box, that gets corroded and needs to be cleaned to fix this issue, but I cant figure out where it is. I attached some pics that I took while fruitlessly searching the harnesses near the fuse box. Could someone tell me which I am looking for?

 

Your washer fluid and fuse box is reversed on my 94 magnum. As I understand it the splice 3 into 1 is below and forward of my fuse box. That would make it a bit forward of the wheel well on mine. I would chase out the harness that passes under your fuse/relay box and look at it forward of the fuse/relay box. You might need to move the washer fluid to get at it.
I have been lucky and never had to deal with it. If you want to use friction tape (that is what that cloth stuff is) instead of electrical tape Ace Hardware has it.

 

I know nothing about the 3 wire splice you are speaking of ..... I recently ran into a issue with a 1993 Caravan with the 3.3. It was a shifting issue.
After much headaches and replacing all the shift sensors .... I finally removed the battery and battery tray and found a connection under it.



My only point is, the plug looked fine on the outside, you had to open it up to see the corrosion inside and this was the obvious problem as it supplied power to the transmission control module.
I'm just suggesting to unplug your connections and inspect, clean them ... see whats inside.

I'm also suspect of connections near the battery, like this one is.
The battery I'm told releases vapors from the post that come through the case .... they are not sealed well. This causes all the corrosion on the battery cables that we need to clean often .... I think all connections near the battery tray are worth checking first.

I have found on the internet so it must be true, I have a tube of dielectric grease I use my finger and smear it around the base of the post coming out of the battery case, to seal up the leaking vapors. So far my cables have stayed clean. .... I suspect any plugs in wire harness near the battery need to be checked after 30 years.