20 PIN MFS connector
20 PIN MFS connector
Hey, I had a quick question. I have seen so many neons with these damned 20 pin MFS connectors burnt and break and become so brittle they'd fall apart. I have an 05' neon sxt that has fogs, and before I found the issue with the plug I attempted to replace the whole turn signal stock to see what the issue was with why my fog lights would not turn off. During night driving they are on all the time and there is no way to turn them off UNLESS I literally PUSH the fog switch in towards the steering column, the indicator light says they are off and they do go off but when I let off the pressure it goes right back on. From what I know you're suppose to pull the knob out to turn them on correct? As a last resort I also pulled a plug off another neon from a junkyard but the stupid plug on the other car has the same burnt issue in the area of pins 9 and 19-20. I looked online and there is a repair kit but that is way expensive but who's to say that that one doesn't develop the same issue? Just looking for some answers.
This is a common problem that has or will affect every second gen Neon. The only thing that varies is how melted the connector (and switch) gets based on use.
The repair kit, while expensive, is the only way to repair the connector. The only way to prevent this from happening is to put a relay into the headlamp circuit to take the load off the headlamp switch and harness.
The repair kit, while expensive, is the only way to repair the connector. The only way to prevent this from happening is to put a relay into the headlamp circuit to take the load off the headlamp switch and harness.
If I could just figure out how to meld the Outback and the Neon into one car...


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Your fog switch plastic system is used. That's why you have to press the button for them to stay off. There's a how-to, by Gnuesrup IIRC, with the solution to that problem on this forum. It's more or less a frequent problem.
As for the burnt connector, that's a very common problem and has probably been the cause of some car burning down.
There's an inexpensive alternative to the repair kit that involves a small trip to the junkyard to find door connectors (Thanks again, Gnuserup). They're the same as the MFS connectors.
Fixing the connector will not fix the overheating issue. The easiest way would be to get a relay harness for the lowbeams and one for the fogs.
As for the burnt connector, that's a very common problem and has probably been the cause of some car burning down.
There's an inexpensive alternative to the repair kit that involves a small trip to the junkyard to find door connectors (Thanks again, Gnuserup). They're the same as the MFS connectors.
Fixing the connector will not fix the overheating issue. The easiest way would be to get a relay harness for the lowbeams and one for the fogs.
Jimmy
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- 2GN Member
- Posts: 393
- Joined: Fri Jan 11, 2008 3:12 pm
- Location: Quebec, Canada