what can cause a slow turn signal

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Old Oct 5, 2024 | 04:24 PM
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Paul Montoya's Avatar
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what can cause a slow turn signal

Good evening everyone. I have a 1967 cutlass convertible and it has a slow turn signal flash on the drivers side. The passenger side has a normal flash? Anyone have suggestions why one is much slower than the other. I just 2 installed new flasher fuses today and nothing changed.

Last edited by Paul Montoya; Oct 5, 2024 at 04:25 PM. Reason: more information
Old Oct 5, 2024 | 05:08 PM
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Flasher fuses or flasher units?

Electro-mechanical flashers work due to heat generated by the current flowing through the circuit. Try swapping the flasher units to see if the slow operation follows the flasher unit. If so, that points to an issue with the flasher unit.
Old Oct 5, 2024 | 05:29 PM
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^^^THIS^^^

You should be able to get a GM flasher unit/relay at the local auto parts store.
Old Oct 5, 2024 | 06:11 PM
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Could be low
Old Oct 5, 2024 | 08:33 PM
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Bad bulb (usually causes a fast flash), bad socket , bad flasher, bad ground...shocker there huh.
Yes chineeeeseium blinker fluid or over filling the blinker fluid reservoir can wreak havoc like a blue hair doin 45 in the left lane of the big road with the blinker on for 20 miles.
Old Oct 5, 2024 | 08:44 PM
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Vintage Chief's Avatar
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Originally Posted by droldsmorland
...a blue hair doin 45 in the left lane of the big road with the blinker on for 20 miles.
Love it. Thought I was the only one who referred to them the exact same.
Old Oct 6, 2024 | 07:13 AM
  #7  
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Originally Posted by Fun71
Flasher fuses or flasher units?

Electro-mechanical flashers work due to heat generated by the current flowing through the circuit. Try swapping the flasher units to see if the slow operation follows the flasher unit. If so, that points to an issue with the flasher unit.
The same single flasher module is used for both sides. If one side is slow and the other side is normal, the flasher is not the problem. The stock electromechanical flasher uses a bimetallic strip that heats up with current, causing the contacts to open. When it cools, the contacts close and the process repeats. If one side is slow, it's because the circuit on that side is drawing less current and thus not heating up the flasher module contact arm as fast. Look for corroded terminals or different bulbs, or anything that could cause different current draw on that side.
Old Oct 6, 2024 | 01:54 PM
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. If one side is slow, it's because the circuit on that side is drawing less current and thus not heating up the flasher module contact arm as fast. Look for corroded terminals or different bulbs, or anything that could cause different current draw on that side.
Thats a very smart deduction.
Im always in awe of folks who understand electrical witchcraft/voodoo things.
​​​​​​​Dark arts.
Old Oct 6, 2024 | 03:24 PM
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Originally Posted by Rallye469
Thats a very smart deduction.
Im always in awe of folks who understand electrical witchcraft/voodoo things.
Dark arts.
That and...
The circuit equations can be determined using Ohm's Law, which gives the relationship between voltage and current in a resistor (V=IR), and Kirchhoff's Current and Voltage Laws, which govern the currents entering and exiting a circuit node and the sum of voltages around a circuit loop, respectively.
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