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Rear turn, hazard and brake lights not working

Tiny
ROCKSAW
  • MEMBER
  • 2006 DODGE DAKOTA
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 139,000 MILES
Rear turn, hazard and brake lights are out. All is fine in front. So I know it's not the relay, because relay is for left or right not front-back. Tow connector is hanging from rear bumper for trailer lights. It has been hanging for 6 months but only recently lights stopped working in rear.
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Saturday, May 8th, 2021 AT 5:27 AM

10 Replies

Tiny
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  • MECHANIC
  • 18,907 POSTS
We need to check the voltage on the highlighted wiring.

https://www.2carpros.com/articles/how-to-check-wiring

I suspect this is the front control module issue as that is what controls the front and rear lamps.

Do the license plate lamps work? What about the high mount stop lamp?

Please let us know about these voltages but I suspect you will find there is no voltage on the signal wires coming from the FCW.

https://www.2carpros.com/articles/how-to-check-wiring

If that is the case then it needs replaced but let's start with this and go from there. Thanks
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Sunday, May 9th, 2021 AT 2:49 PM
Tiny
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What is a FCW?,The FCM or (The Front Control Module) controls all exterior lights, except brake lights and turn signals according to this site:
https://www.fixya.com/cars/t26346559-2006_dodge_dakota_4x4_slt_body_control
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Sunday, May 9th, 2021 AT 8:40 PM
Tiny
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Yes. Sorry. Not sure why I said FCW as that is forward collision warning system on newer vehicles. I was working with someone on that system so it must have just come out.

As for this other info, this is just another website where someone is interpreting the information they are reading from the manual or the way they think it works. They sound knowledgeable but just not accurate. Take a look at the wiring diagram. The front and rear turn signals are controlled directly out of the FCM.

So we need to test the voltage on these wires to find out what is going on.

Until we have actual diagnostic information we are just going to guess and unfortunately there is a bunch of inaccurate info out there so it is better to work through the issue on what your vehicle is doing.
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Monday, May 10th, 2021 AT 7:10 PM
Tiny
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It's not just turn signals it's also brake lights. I saved the images you posted you have turn signals highlighted but not brakes. Not sure how to test them with it installed. I'll get back to you.
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Tuesday, May 11th, 2021 AT 5:06 PM
Tiny
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I understand it is both. We need to go to the light assembly and plug the connector in and back probe the wire with a test light. If the light does not light up then there is no voltage.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

I am sure you will not have voltage. So we need to track the turn signals back to the FCM and find out if you have voltage coming out of it. Then do the same for the brake lights.

Can you answer if the high mount works and the license plate lamp works? That will help narrow down possible causes.
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Wednesday, May 12th, 2021 AT 5:58 PM
Tiny
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High mount is out and plate lights working and parking lights working.
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Friday, May 14th, 2021 AT 5:18 AM
Tiny
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I found a used 1 with same part #04692009AJ https://www.ebay.com/itm/353486134169, I also called dealer they want $1,300.00 for a new one, lmao... But i was only checking cost for reference at this time. I'm hoping it's still something i overlooked a lot cheaper.
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Saturday, May 15th, 2021 AT 7:31 AM
Tiny
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If the high mount is out as well then that pretty much points directly to the FCM with the other issues added. Also, the tag lights working points to it as well due to the fact that they are feed from a separate feed in the IPM.

Take a look at this highlighted wire as well on the diagram.
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Sunday, May 16th, 2021 AT 5:08 PM
Tiny
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Thank you for the help. When I get the part and install it I'll let you know what happens. It will be awhile though a month or 3.
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Friday, May 21st, 2021 AT 6:58 AM
Tiny
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No problem. We will be here whenever you get to it. Thanks for the update.
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Friday, May 21st, 2021 AT 6:42 PM

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