Ford F-150 (2004-2008) :: Horn Blows And Lights Starts Flashing
Apr 6, 2011
I have a 2007 F150 Lariat with a 5.4 L engine. Bought it 6 weeks ago from the original owner. Has 50,000 miles on it. He had a Ford command start installed when it was new, and received a new key FOB at that time. When I drive the vehicle, sometimes the horn will start blowing and the lights start flashing which to me, indicates the trucks security alarm is activated. The only way to make it stop, is to hit the unlock button on the key FOB. It also does it sometimes when it's not running and I open a door. Previous owner had same problem so he disconnected the horn!!?!
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My car horn starts honking and the lights start flashing, spontaneously. The neighbors are going to kill me if I don't die of sleep deprivation first. The problem started a few minutes after 6 a.m. yesterday, and stopped when I turned the car on I left the car running in the driveway (illegally) and then cut it off after about 30 minutes, and all was quiet until around 8:45 a.m., when it started again. The only way I can get it to stop is to press the UNLOCK button on the car's remote; but that doesn't make it quit for good, sometimes only makes it quit for a few seconds.
Anyway, I drove the car to work and it was nice and quiet all day. (I went by the mechanic's on the way to work and had to set an appt. for Monday but I don't think I can stand it until then. This morning the honking/flashing began at 1:52 a.m. I pushed the remote. It stopped until 2:08. It kind of went like that until I finally started up the car. It is now emitting carbon and I am a zombie. What can I disable or override until a mechanic can take care of this? Is it a mechanical problem? A goofed-up sensor? Is this tied to a computer chip problem?
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We have a 2013 Prius v two that is 5 months old. It has NO alarm system. This morning while sitting in our garage the car sounded as if a car alarm went off. The lights started flashing and the horn went off and on for 10 seconds or so. This happened three times over a period of 2 hours. There is no car alarm in this car.
I turned on the car to see if there were any error messages. We are coming up on the 5000 mile maintenance and the indicator for that was on. There were no error messages.
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Ok on Sunday I washed my car, dried it including opening the hood and trunk as I normally do. On Monday morning I pushed my remote twice like normal and started to walk away but then i noticed I heard no horn. So I hit the lock button again twice in a row this time looking at the car and this time I noticed that the lights didn't flash either, however I could hear the locks lock. Just to make sure I tried to open the doors and they were locked.
So today I got out the manual and looked in section 4/12 - 4/18. It says that one lock button pressed lights flash, within 4 seconds hit again and lights flash and horn will honk once. I never saw anything about deactivation of this feature... So Just to make sure i went around and opened all doors, trunk and hood, then closed them all. I tried again to arm the alarm, hit the lock button twice and again no horn honk or flashing lights. So I finally opened up the hood and wanted to see if the hood pressure switch was maybe out of alignment. looked fine then i held it down and pressed the lock button on the remote, and BAM the lights flashed, pressed it again and lights flashed and horn honked once. Held it down for about 20-25 seconds till i saw the alarm light start flashing released it and the alarm set off. Next I closed the hood tried again, but once again the lights didn't flash and no horn....
Started looking at the top of the hood where the pressure switch would touch touch when closed, and noticed that it looks like maybe I am missing a rubber stopper on the hood that presses the switch, maybe when i was drying under the hood I knocked it off? Or maybe my pressure switch needs to be adjusted?
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My command start for 2008 explorer was installed by ford dealer couple of years ago. Now when I press remote start, horn beeps 1 time, doors lock, lights come on then it should start but instead horn beeps once again and vehicle does not start , radio and heater in vehicle run as if vehicle was started.
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Just put in a new 12v battery but when I try to connect the ground cable, I'm getting sparks, indicating a current draw. And the horn starts blowing nonstop.
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I've got a 93 ford 150 econo Van 310,000 miles. Steering volume ratchet shaft bused a couple of years ago. Horn worked then only the airbag lite would flash on and off. Got everything from the yard, steering wheel, air bag the whole thing. Replaced it and the air bag light stayed off and horn worked! About 6 months ago the airbag light again on & off then right after that the horn wouldn't work. However after a good rain and as I was turning mostly right sometimes left. The horn would just start blowing until I straighten the wheel and if someone was close by I would just wave. But the horn would still not work normally. it is finding a ground when I turn the wheel. I have no leak inside only happens in or after a rain sometimes. It rains a lot.
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I was going to check the oil so I popped the hood and as soon as i did that the horn started to honk and the 4 ways came on. didn't have the key in the ignition. it wouldn't start either while this was going on. had to take battery cable off. Rehooked after awhile and the same thing.
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My 08, when I connect my 7-pin trailer up, bouncing down the road that message and tone CONSTANTLY going off....drives me nuts! I have went thru the wire harness 2x now, cleaned all the contacts, etc. Any other thing short of a 12 gauge? When it does pop on, the controller starts flashing...I've reached down a few times and manually hit the brakes and it still hits em so whatever it is, I feel its very minor or whatever....just don't know where to go now! All contacts have been cleaned good as well.
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Every time that I hit the brakes, the headlights flash and the horn blows for about 30 seconds. I am guessing that it has something to do with the factory alarm? I do not have a key pad. It is a 1997 F-150.
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Having difficulties with an air conditioner. 2006 KR F150. The air blows, but not cold. I just had everything checked in regards to pressures, freon, etc., but still only blows ambient temperatures.
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My horn suddenly stays on when I hit the horn and it doesn't beep when I lock the door with the key fob. Only way to turn it off is to shut off the truck. I thought it may be a faulty horn relay. I've asked many mechanics where the horn relay is located and every one gives a different answer. Under the hood, in the driver side kick panel, under the dash, near the horn itself. Where the horn relay is located on a 2004 F-150....
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My blower in my truck only blows at levels 3 and 4. Do the blower motor going out? Switch? Motor relay? I've read a bunch of things try?
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I have a f150 2007 with a 4.2 in it. The CEL comes on and when this happens the air comes out the a/c vents and no where else. We have cleared the code out but it comes back on when we do clear it out the air blows out where the dial is set. I think there is a vac leak somewhere....
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My daughter's 2004 F150 has a horn problem. She used it the other day and it would not stop blowing. Someone unplugged it for her. When I checked it out and re-plugged it in it still continues to blow. Question is where do I begin. Does this have a horn relay? Do I have to remove the air bag to access the connections under the pad? I own a 1985 F150 and mine is much simpler.
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I have an 06 F-150, there is lots of heat but it only blows on defrost. Is this the blend door motor or is it something else?
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My AC blows hot air, like heater hot, but the defrost on cold blows cold air. At first the AC would cut out at low rpm's (stop sign or red light) and cut back on, now its nothing. But the defrost blowing cold, enough to fog up the windshield, tells me its not the compressor or freon.
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Either running A/C or heat.. air only blows on the '2' and '4' setting.. so I have middle of the road or WOT when it comes to the amount of air. On the '1' setting nothing comes out and '3' setting is the exact same at the '2' setting. What is going on with this.
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The AC in my F-150 Super crew Lariat 5.4 was just charged and works fine until the temp reaches ninety degrees, then it blows hot. What this could be?
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Horn recently stopped working. I checked the fuse, noticed it was blown. I replaced with a new fuse. Pressed the horn and it had a very short sound and then blew the fuse. What could be causing this?
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2006 F150 King Ranch. My Air Conditioning no longer blows cold air. Additionally, the Temp Guage is pegged dead left. No movement at all even at normal operating temp. I've had the dealer replace 2 sensors and a wiring asy (XL3Z-14A411-AA). I still have the same problem. No cold air and the gauge is still pegged dead left.
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