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tail lights stay on

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Old 01-16-2012, 09:24 PM
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tail lights stay on

08 F150 SXT. tail lights stay on weather pedal is pressed or not. i checked the switch on the pedal.looks ok. replaced the multi function switch. worked for bout a week. checked fuses 1 bad (run/accessory -wipers, instrument cluster, & audio for stx). right rear turn bulb is blown.
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Old 01-17-2012, 10:42 AM
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I am assuming you replaced the blown bulb? And by taillights I am assuming you mean brakelights. You have turn/brakelights and then you also have taillights/marker lights.

By chance are you running LED light bulbs?
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Old 01-17-2012, 10:54 AM
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Do you have a trailer brake controller?
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Old 01-23-2012, 11:05 PM
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no brake controler and no leds.changed bulbs . turn signal on passager side still don't work. just found out the 3rd break light don't work at all.
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Old 01-24-2012, 08:31 AM
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Sounds like you have a bad spot in your wiring harness. has the wiring been modified for any reason?
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Old 01-24-2012, 01:36 PM
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Is the vehicle new to you? Sounds like the wiring was modified for previous owner if the truck is new to you. Maybe a remote start or ???? who knows.
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Old 01-24-2012, 07:29 PM
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I,ve had the truck bout 18 months found out later it was leased .ever get your truck back from a dealship & it was worst than what it was. things are going wronge that shouldn't.
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Old 01-24-2012, 08:10 PM
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The wire for the third brakelight comes directly from the brake pedal switch. It's lightgreen(at least it was on the earlier trucks). I don't know if Autozone has diagrams for your year truck or not.
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Old 01-24-2012, 08:50 PM
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i'll check that out thnx
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Old 01-24-2012, 08:58 PM
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Quote:
Originally Posted by thomabb View Post
Sounds like you have a bad spot in your wiring harness. has the wiring been modified for any reason?
there was a chip spliced into the MAF sensor. i took it out wire nut everything togetthere. Ford wants too much for a new. it should get replaced
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