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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

electrical gremlins

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Old Mar 21, 2026 | 08:10 PM
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Default electrical gremlins

When the key is on the right rear tail light flickers. It does not do this at any other time. Anyone see this before?

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Old Mar 22, 2026 | 01:42 AM
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key is on engine running or not?
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Old Mar 23, 2026 | 09:03 PM
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Here is a quick video for clarification

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File Type: mov
IMG_3756.MOV (18.91 MB, 5 views)
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Old Mar 23, 2026 | 09:05 PM
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Yes, key on engine not running. That is the only time it does it. See attached video.
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Old Mar 23, 2026 | 10:03 PM
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Originally Posted by MeanGene
When the key is on the right rear tail light flickers. It does not do this at any other time. Anyone see this before?
have you inspected your cables/terminals and grounds ?
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Old Mar 24, 2026 | 03:19 AM
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Members on this Forum are very skilled at solving the issues that your truck may be experiencing BUT we need you to fully describe your vehicle and symptoms leading up to this issue such a recent work performed, modifications etc. Maintenance history?

As a minimum – Make, Model, Year, Engine, Trans, 4x4(?), Mileage.
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Old Mar 24, 2026 | 09:11 PM
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I did that probably 10 years ago but the info wound up in a bit buket somewhere I guess. I will add it again, thanks
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Old Mar 25, 2026 | 05:31 PM
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Originally Posted by MeanGene
I did that probably 10 years ago but the info wound up in a bit buket somewhere I guess. I will add it again, thanks


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