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

no tail lights

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Old Aug 31, 2017 | 11:23 PM
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Default no tail lights

i have no tail lights.
brake lights did work today for once.
no reverse lights
no running lights
i do have signal/hazard lights but the relay is shot so they are signaling faster.

under the drivers door i took apart the top connector and cleaned it out with electrical spray and very carefully cleaned what i could off the pins.i let the spray dry for over an hour before re connecting.
fuse is good.

where do i start to find the issue?

also under the drivers door is two connectors,what is the bottom for?
the reason i ask this as my fuel gauge is randomly working.i had the sender unit changed out
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Old Sep 1, 2017 | 09:04 AM
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Hyper flashing of the turn signals indicates a burnt bulb in the system not a bad flasher unit.
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Old Sep 1, 2017 | 09:41 AM
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Originally Posted by techrep
Hyper flashing of the turn signals indicates a burnt bulb in the system not a bad flasher unit.
all flasher bulbs are working fine,none are burnt out

just drove the truck and fuel gauge works and so does the brake lights now
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Old Sep 1, 2017 | 10:35 AM
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flasher is under the drivers side dash, not the door.

The relay is in the fuse panel.

So, not sure what your talking about "under the drivers door" as far as anything associated with the flashers or brake lights.
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Old Sep 1, 2017 | 01:15 PM
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Originally Posted by Jamieat
flasher is under the drivers side dash, not the door.

The relay is in the fuse panel.

So, not sure what your talking about "under the drivers door" as far as anything associated with the flashers or brake lights.
the signal light flasher relay unit(the unit that makes the clicking noise was attached under the steering wheel column)

under the drivers door attached to the chassis of the truck is a black plastic cover,underneath that is two wiring connectors.
i cleaned off the top connector
what is the bottom one for?

cheers for the replies

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Old Sep 1, 2017 | 01:59 PM
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Originally Posted by Ukfordf150
all flasher bulbs are working fine,none are burnt out

just drove the truck and fuel gauge works and so does the brake lights now
What about the third brake light ?
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Old Sep 1, 2017 | 02:06 PM
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Originally Posted by techrep
What about the third brake light ?
ahhhh
dont think thats ever worked
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Old Sep 1, 2017 | 02:45 PM
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So I guess your cruise control don't work either ?
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Old Sep 1, 2017 | 02:58 PM
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Originally Posted by techrep
So I guess your cruise control don't work either ?
ok brakes lights all work.two on rear wings and one on the roof,just been out and checked.
these didnt work the other day.

i now have no running lights or reverse lights.

as for cruise control,not sure,never use it.
i am in work at the mo,so will try later

thanks for reply

i think i know were you are guiding me too.
the relay which controls speed control unit,reverse lamps etc
i have no idea where it is on the truck

Last edited by Ukfordf150; Sep 1, 2017 at 03:29 PM.
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Old Sep 1, 2017 | 04:06 PM
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the signal light flasher relay unit(the unit that makes the clicking noise was attached under the steering wheel column)
Yes, to this is which I referred when describing under the drivers side dash. Sorry if I wasn't descriptive enough.

There is also a relay, which is also associated with the lighting system, that is located in the fuse panel, behind the kick plate, on the passenger side floor board.

Do you have any LED's or have you recently installed any? Or other Mods?

This will help trouble shoot. I've had many lighting issues due to various aftermarket additions and have spent a great deal of time troubleshooting all of this. So, I may can provide some advice, or atleast give you some trouble shooting ideas if we know how the issue arose or when.

There is the relay for the brake lights / cruise control. This operates independantly from the other lighting circuits for safety cruise control deactivation purposes.

The other relay, in the kick panel, controls the high/low beams/ fog light deactivation.
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