Turn signal and brake light woes

[Ducati2]

Suddenly my turn and brake lights on my 2005 TJ quit working. Running lights are ok. Fuse number 27 (MFSW) keeps blowing. So I purchase this
Multifunction switch
from Amazon along with a new flasher relay
Relay
First thing I noticed when installing was the relay took lots of muscle to get it maybe ~75% inserted. Same with old relay. So, I plug all back in, rehook up the battery and the blinkers work. Then I depress the emergency flasher button and poof goes the same fuse. Any thoughts? Did Amazon send me the wrong part? Or what?.. any guidance appreciated!

 

[CharlesHS]

I would remove the MFS; inspect the wiring harness and the MFS receptacle for the Flasher/Turn Signals to see if there signs of overheating.

 

[Ducati2]

Yep that connection is pretty cooked! Is there a kit to fix? Or what do I do now? Was this a result of LED taillights I installed?

 

[Ducati2]

Pix attached

 

[macleanflood]

Thread 'Wells Vehicle Electronics (WVE) Multi-function Switch & Connector'

Jul 29, 2023

Like many others, my multi-function switch had begun to act up. My fog lights were not turning on by themselves, but if I was driving with the lights on and hit a good bump, I would get a long series of warning beeps. No engine light or anything else, just 10+ beeps. The first time it happened was a little wild looking for the reason for the noise, but I researched here and found how this is a problem with our turn switch, its connector, or both.

I recently figured out I could cancel the beeping if I lifted the turn signal like I was about to make a right turn. However, not wanting to...

• Fulton_Hogan
• multifunction switch multifunction switch connector turn signal turn signal lever wells vehicle electronics wve
• Replies: 28
• Forum: TJ General Discussion

• 

 

[Ducati2]

Yesterday I spent a good deal of time installing a new MFS switch, a new flasher cube AND a new new MFS connector. I spent most of the time with the connector and triple checked order of wires , etc. MFS FUSE STILL BLOWS. Ugggh! Are there any common weak links between the switch and the fuse I should check? Any help deeply appreciated!

 

[macleanflood]

Test your clock spring, perhaps? Or unplug it.

I'd pull all your bulbs...turn signal, tail lights, unplug the headlights.

-Mac

 

[CharlesHS]

I don’t suppose you have a trailer harness wired into the parking/turn signals ?
They have been known to cause problems similar to what you describe.

 

[Ducati2]

I don’t suppose you have a trailer harness wired into the parking/turn signals ?
They have been known to cause problems similar to what you describe.

I’ve never used it, but YES I do! Wonder if I can just snip it all out without totally messing things up? Previous owner towed a small trailer to rock crawling events. Still had some device wired up that was screwed to lower dash, it was in way of my leg room , so just yesterday I unscrewed it and zip tied it further back. This move was after I discovered the blinkers and brake lights not working, so the move didn’t cause it.
Again, wondering if I can just snip it out , or if some wires would need to be reconnected?

 

[CharlesHS]

That device is a brake controller.
You may be able to just unplug the harness instead of snipping the wiring.

 

[Ducati2]

.. I unplugged the battery trailer brake system and no luck. Still blowing mfs switch