Blinker not blinking

[Texans18]

Recently changed my front right blinker bulb, turns on, but still does not blink. What other issues could it be? Could it be the turn signal relay?

 

[NETim]

Maybe swap the right and left bulbs to see what happens? I am assuming the LH (driver's side) does blink now and the original front right bulb did blink until changed.

 

[Texans18]

The LH side was always able to blink, I did not change that bulb. The right original bulb also turned on but did not blink. Very rarely it will blink, but is significantly less dim than the left and then will go back to not blinking for awhile.

 

[Burla]

If the blinker fluid is good it may be TIPM, see if fogs are working correctly? And if there are any other little things like windows on fritz? If it is just one side and occasionally blinking, it could be wiring to that bulb?

 

[NETim]

The LH side was always able to blink, I did not change that bulb. The right original bulb also turned on but did not blink. Very rarely it will blink, but is significantly less dim than the left and then will go back to not blinking for awhile.

Then I suppose it could be the turn signal relay. I am assuming the same relay controls both sides. It could be the contacts for the RH side have gone bad, i.e., making but not breaking, in that case.

On edit: Maybe I'm giving bad info previously. Looking over the TIPM relay diagram, I don't see a relay for the blinkers. Now I have to think the blinkers are controlled by the BCM.

 

[Atcer2018]

I remember when turn signals had a relay under the dash that made noise when they were on. I haven’t replaced one in years. Do our trucks have them? If they do and it’s bad that would cause the no blink situation.

 

[Texans18]

Then I suppose it could be the turn signal relay. I am assuming the same relay controls both sides. It could be the contacts for the RH side have gone bad, i.e., making but not breaking, in that case.

On edit: Maybe I'm giving bad info previously. Looking over the TIPM relay diagram, I don't see a relay for the blinkers. Now I have to think the blinkers are controlled by the BCM.

Alright, so what I am getting from all of this now is that it could be faulty wiring or a bad BCM?

 

[NETim]

Alright, so what I am getting from all of this now is that it could be faulty wiring or a bad BCM?

That's the way I'm leaning as well as the TIPM. Probably some YT videos on this out there.

 

[Atcer2018]

Alright, so what I am getting from all of this now is that it could be faulty wiring or a bad BCM?

Could also be the turn signal switch in the steering column, bad ground, bad socket, wiring is faulty. Do you have a meter to diagnose power and continuity?

 

[Atcer2018]

Also does the right rear signal blink? Does the EVIC show a bulb out message? BCM’s and TIPM’s are expensive, check wiring including the ground before sinking cash into the expensive stuff.

 

[NETim]

This is as close as the shop manual comes to troubleshooting this issue:

 

[Texans18]

Also does the right rear signal blink? Does the EVIC show a bulb out message? BCM’s and TIPM’s are expensive, check wiring including the ground before sinking cash into the expensive stuff.

I do not have a meter to check power and continuity. The rear signal does still blink and the EVIC shoes the message for a "bulb out" when it is not blinking. But again wont show the message when it does blink every so often.

 

[NETim]

I do not have a meter to check power and continuity. The rear signal does still blink and the EVIC shoes the message for a "bulb out" when it is not blinking. But again wont show the message when it does blink every so often.

I think I'd try to find where that front turn signal connector picks up its' ground. I'm betting it's connected to the body in close proximity to the light assembly.

 

[crash68]

I think I'd try to find where that front turn signal connector picks up its' ground. I'm betting it's connected to the body in close proximity to the light assembly.

I'm going to say the ground goes back to the BCM, that's in part how they determine if the bulb is working.

@Texans18 what does the bulb socket look like on the turn signal look like? Might be a bad socket which is replaceable.

 

[Atcer2018]

I’m with NETim on the ground.

 

[turkeybird56]

I'm going to say the ground goes back to the BCM, that's in part how they determine if the bulb is working.

@Texans18 what does the bulb socket look like on the turn signal look like? Might be a bad socket which is replaceable.

Sounds like ground or socket, though wire "could" be bad. Check socket for power to it with a meter. They are real cheap, U can even get a low end meter for like $15 at TSC. U do not need the $129.00 one, lol.

 

[NETim]

I'm going to say the ground goes back to the BCM, that's in part how they determine if the bulb is working.

@Texans18 what does the bulb socket look like on the turn signal look like? Might be a bad socket which is replaceable.

I'm just guessing. They are hundreds of pages of wiring diagrams for the truck in the shop manual. Unfortunately, I haven't found a way to search them efficiently.

 

[Marshall]

I would get a different bulb , wrong one or bad
I would meter the voltage and compare to other side

 

[Sherman Bird]

Recently changed my front right blinker bulb, turns on, but still does not blink. What other issues could it be? Could it be the turn signal relay?

The turn signals are on the LIN BUS system. Diagnosis requires equipment and training which few DIY'ers possess. If you do NOT seek professional diags, it is likely that you will spend a fortune "NOT" paying a professional by replacing expensive components unnecessarily.

 

[PA Ram]

Definitely blinker fluid!!! J/K, watching this thread to see what caused the problem just in case it ever happens to me. Hope you get it worked out, would drive my OCD crazy, not to mention if it does not blink it could be dangerous if someone across from you doesn't know you're turning.