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Residual blinker light

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Old Mar 12, 2014 | 11:32 PM
  #1  
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Residual blinker light

Where do I need to start to fix my issue of the passenger (right side) blinker is kinda illuminated when not in use? I'm electrically challenged. I have a volt meter thingamajig. It's been an issue since I've got the truck. I am clueless.
Thanks for any help you can offer.

http://s1272.photobucket.com/user/jo...g.html?filters[user]=133764660&filters[recent]=1&sort=1&o=0
 
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Old Mar 13, 2014 | 02:42 AM
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I'd say you have a bad ground someplace and it is backfeeding thru the signal light. Just see what is on when it does it and thats probably the circuit, otherwise check them all. I couldn't see your picture but thats what usually does it..
 
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Old Mar 13, 2014 | 02:45 AM
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Here is his photo.

 
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Old Mar 13, 2014 | 08:20 AM
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I'm assuming this only happens when the parking lights or headlights are on, correct? Your front right turn signal socket is bad. Replace both front sockets. This is called "ground shift" and is a very common problem. If you search these terms, you will find more detailed technical explanations from me regarding the background of the problem.
 
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Old Mar 13, 2014 | 10:34 AM
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Okay I thought he meant the external lamp, you are probably correct in what you said there
 
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Old Mar 13, 2014 | 11:18 AM
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Originally Posted by wdfp
Okay I thought he meant the external lamp, you are probably correct in what you said there
Your first post was correct and we're saying the same thing. I agree with everything you've said. While the symptom shows up inside, the problem is actually outside.

When the ground at the front signal light is bad, parking light current can't return to ground properly, so flows back to ground through the turn signal filament, then the indicator and finally the ground at the instrument cluster. Current flowing through two filaments essentially in series before even making it to the indicator is why the indicator light is so dim and not at its normal brightness. This is ground shift.
 
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Old Mar 13, 2014 | 12:44 PM
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I just fixed the exact issue with my truck! I replaced the socket on the affected side's front signal lamp and the problem went away. It's on the list to do the other side.
 
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Old Mar 13, 2014 | 01:26 PM
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Thank you everyone

Hey thanks. As I've said electrical mystifies me.
 
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Old Mar 13, 2014 | 05:24 PM
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Now that the thread has apparently run it's course, I'd like to ask a question rather than starting a new thread.

Sometimes my turn signals (exterior) blink but the instrument panel indicators do not. Sometimes the instrument panel indicators "glow" slightly before starting to blink. Sometimes the external signals do not blink at all, when this happens, the dash indicators don't blink either. It all seems to be random as to what happens and when.

If it matters this happens when the headlights are on or off, makes no difference.

What should I be looking at to correct this?

Thanks for any help.

Dennis
 
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Old Mar 13, 2014 | 05:55 PM
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Originally Posted by 1978f-250
Sometimes my turn signals (exterior) blink but the instrument panel indicators do not. Sometimes the instrument panel indicators "glow" slightly before starting to blink.
In the absence of any other symptoms, this would indicate an issue with the indicator wiring to the cluster, or the cluster itself (connector not fully seated).

Originally Posted by 1978f-250
Sometimes the external signals do not blink at all, when this happens, the dash indicators don't blink either.
This could indicate a problem with the turn signal switch or flasher. Unfortunately, intermittent electrical problems are tough to solve. Maybe as a fast and cheap start, you can reach behind the cluster to make sure the cluster connector feels like it's seated, and then replace the turn signal flasher. It's tough to diagnosis multiple issues at once that may or may not be related, so hopefully these first simple steps help limit what you're working with.
 
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Old Mar 14, 2014 | 02:48 PM
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Originally Posted by fmc400
In the absence of any other symptoms, this would indicate an issue with the indicator wiring to the cluster, or the cluster itself (connector not fully seated).



This could indicate a problem with the turn signal switch or flasher. Unfortunately, intermittent electrical problems are tough to solve. Maybe as a fast and cheap start, you can reach behind the cluster to make sure the cluster connector feels like it's seated, and then replace the turn signal flasher. It's tough to diagnosis multiple issues at once that may or may not be related, so hopefully these first simple steps help limit what you're working with.
Thanks for the info. As soon as I get a day off I will check these things out.

Dennis
 
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Old Sep 4, 2014 | 08:21 PM
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Originally Posted by fmc400
In the absence of any other symptoms, this would indicate an issue with the indicator wiring to the cluster, or the cluster itself (connector not fully seated).



This could indicate a problem with the turn signal switch or flasher. Unfortunately, intermittent electrical problems are tough to solve. Maybe as a fast and cheap start, you can reach behind the cluster to make sure the cluster connector feels like it's seated, and then replace the turn signal flasher. It's tough to diagnosis multiple issues at once that may or may not be related, so hopefully these first simple steps help limit what you're working with.


I had to replace a passenger side headlight today and I recalled the issue with the turn signals. they've been working fine for months now but the passenger side parking light stopped working. I took the turn signal lens off and found the PO had put a half-strip of electrical tape around the top half of the base of the bulb, presumably to make it fit tighter. I replaced the bulb with a new 1157 and also put the tape around the base to make it fit tighter.


It worked but only sporadically. Wiggling the bulb around made it work properly. I decided to order two new sockets for both sides of turn signals. Got them from Bronco Graveyard and they'll be here soon. Hopefully the new sockets will make the bulb fit tighter. Apparently that's the only problem.


Dennis
 
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