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Turn signal relay?

22363 Views 22 Replies 7 Participants Last post by  jesusrincon106
I have a 300c 06, and wonder where the turn signal relay is located, and is it same relay for the hazard?

I have changed my rear turn signal bulbs to led's (triton v3), now after some years when I flash to right or left the led just flashes odd, but if I turn the hazards on, they flash normally. The front ones are bulbs and flashes normally. Don't really think both the left and rear led broke down at the same time, therefor I'm asking.

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Tried with ordinary bulb - same result.
Disconnected the battery - same result.

Here is a video how it flash, and as I said if turn on the hazard, it flashes normally.
In front I don't use LED just ordinary bulbs. I changed to ordinary bulb on left rear side and had the same problem, so I did not test to replace the right rear side as well.
Yes I have an removable tow bar, have not used it for years, and the electrical adapter is not installed because the tow bar in not fitted, but I will check the electrical connector so it's not packed with ice.

As I understan the FCM is controlling the turn signals, maybe the FCM is bad.
Are this front control module compatible? The only that is different is the numbers marked in red.

The FCM that I found is from an Dodge Magnum, I've read that when replacing the FCM the Pinion Factor must be programed to it, what is that and what does it affect?



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I do not have a tow bar, but I do recall reading on the forum that there is an internal ground switch that gets corroded and screws things up.
Is it not the same ground for hazard light and turn signal? I only have problem with my turn signals, the hazard works without any problem. But anyway where is this ground switch located, so I might ba able to check that?
Again, I do not have a tow bar and am only reporting what I read here on the forum, which indicated that the ground switch is located within the socket mounted on the hitch that the trailer connector plugs into such that the switch operates automatically. The problem is corrosion within the switch. Sorry but I don't recall the fix, but if I were having the problem I would give it a shot of WD40 and insert/remove the trailer's plug several times to get things cleaned up.

Give it a go!
No luck with the wd40, still same problem.
My plan B, this weekend. Will try the FCM from the Dodge Magnum (the one that I post picture of). Any advice when I try the other FCM?
Disconnect the battery - replace the FCM - connect the battery - start and see what happens.....If it doesn't work, change back to the original....
FCM provides the signal to energise the relay module, the relay is the what you can hear in the car that click clicks everytime when the indicator is on. It should be somewhere behind the dash or worse inbuilt to the binnacle? I remember seeing some modules beneath the glove box, it might be just around there?

Is it the same relay module for the hazard as for the turn signal? I think I heard some click click from the right side of the trunk.
Today I replaced the FCM, still the same problem.

I found this relay in the right back fender, it click click when I use the turn signals.
And if I disconnect it, the turn signal does work at all.
Have not found so much about this relay than it has something to do with the towbar.


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After that I found some installation diagram/instructions for this towbar electrical I finally found the problem, it was one of two 15amp fuse that was broken. Replaced the fuse and now everything is working as it should.
Now I know how this trailer/towbar stuff is installed, so next time I get some problem I know how to pin point the problem.... I guess. And I got a FCM as a spare part.

Thanks for all help and support!!


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