Turn signal and brake light woes

Ducati2 · Nov 11, 2024

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 · Nov 11, 2024

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 · Nov 12, 2024

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 · Nov 12, 2024

Pix attached

macleanflood · Nov 12, 2024

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...

Ducati2 · Nov 16, 2024

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 · Nov 16, 2024

Test your clock spring, perhaps? Or unplug it.

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

-Mac

CharlesHS · Nov 16, 2024

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 · Nov 17, 2024

CharlesHS said:
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 · Nov 17, 2024

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

Ducati2 · Nov 17, 2024

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

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Turn signal and brake light woes

Ducati2

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CharlesHS

TJ Guru

Ducati2

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Ducati2

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macleanflood

I break sh!t

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

Ducati2

Member

macleanflood

I break sh!t

CharlesHS

TJ Guru

Ducati2

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CharlesHS

TJ Guru

Ducati2

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