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#1 |
Registered User
Join Date: Feb 2017
Location: Houston tx
Posts: 116
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Blinker issue
Noticed that my front driver side blinker with all of a sudden start blinking on its own without the key. It will blink for a few minutes then stop. It's weird. I did replace the turn signal a while back with an aftermarket one. Not sure if this is right but I can active the blinker to both side without the key. Any help is always appreciated
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#2 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,706
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Re: Blinker issue
Left and right turn signals operate only with the key on. The hazard blinker works with key on or off. Can you tell more about what you have going on? When you say "I can active the blinker to both side without the key." do you mean both sides at one time using the hazard switch? Does the hazard switch blink both sides in front and in back (all 4 corners of truck blinking)? What year is your truck?
Here is a wiring diagram http://67-72chevytrucks.com/vboard/s...49#post7809749 Here is a helpful thread about the turn signal switch and testing http://67-72chevytrucks.com/vboard/s...d.php?t=712235 |
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#3 | |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,911
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Re: Blinker issue
Quote:
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#4 |
Registered User
Join Date: Feb 2017
Location: Houston tx
Posts: 116
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Re: Blinker issue
Yes with the key off and not touching it.Without the key in the ignition my front drivers side bumper blinker with start flashing for a while then stop. Also without the key in the ignition , if I turn the signal lever to the left , both the drivers side front bumper blinker and the driver side taillight will blink. If I turn the lever to the opposite side (right) the same and only the driver's side front bumper blinker will start flashing. Not sure how it's getting power. By the way it's a 71 c10 .
Last edited by Tony71c10; 02-20-2020 at 12:28 AM. |
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#5 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,911
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Re: Blinker issue
One more question: when you say you replaced the turn signal with aftermarket, are you talking about parts inside the steering column or did you install a turn signal unit on the outside of the column?
Actually, I thought of another question: when it's blinking, do you hear the flasher unit cycling on and off?
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#6 | |
Registered User
Join Date: Feb 2017
Location: Houston tx
Posts: 116
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Re: Blinker issue
Quote:
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#7 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,706
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Re: Blinker issue
This is a weird problem. I suggest inspect your wiring carefully, especially where it connects to the turn signal switch and the turn signal switch wires that go up into the steering column. Make sure you don't have shorts or skinned wires.
The turn signal flasher doesn't have power with the key off, and the hazard flasher does have power with the key off. Both this switched power and always-on power go into the turn signal switch in the column, so any mix up is likely to be in the wiring to the column or inside the turn signal switch itself. It could be a defective turn signal switch. It is also possible there is a short from an area of skinned wires or by some random tiny strand of wire poking out where the wire is crimped to a terminal. By your description of the symptom it is logical that the light blue wire is shorted to brown wire. What do you get if you remove the hazard flasher module (the one near the "traffic haz" fuse)? Does the intermittent problem go away but the turn signal still work with key on and when you intentionally turn on left or right blinker? I'm thinking that hazard module must be the module you hear ticking when you have this unexplained sometimes front left bumper blink. My additional notes from the wiring diagram I gave you the link to earlier: |
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#8 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,706
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Re: Blinker issue
I also suggest use a multimeter or test light to test the fuse panel, to make sure each area or zone of the fuse panel gets power with key on, and areas that are not supposed to get power with key off are actually powered off. I find it weird that your turn signal works with key off.
Here is a diagram of the fuse panel areas. http://67-72chevytrucks.com/vboard/s...98#post8004798 I am wondering if the turn signal switch has mixed up wires, such as the wires from the turn signal switch are not pinned into the right places in the plastic connector. It is possible you have more than one problem going on. |
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