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Old February 16th, 2007, 02:47 PM   #1
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Default O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

I have a '99 F150 and it's had an intermittent problem of the dome light and the 'door ajar' light staying on . Turns out that on the later model F150 (and on several '97 and later Ford models) the actual light switch is behind the door latch inside the door! Never really noticed it before as I didn't leave the stereo on with doors open but once the problem cropped up I couldn't find the usual plunger switch. It tends to get mucked up or act up when you have wide temperature swings or humidity/moisture changes.
So thanks to Google, found a solution if you run in to this problem: WD-40 or other lubricant spray. Open the door and send that latch to heaven 'cause you need to spray the hell out of it. I sprayed up all around the door latch until WD was running out the bottom and after a couple slams it works great.
Likely I'll have to do it again but hey - $2 can of WD versus a service call or new door latches.
Just some friendly tips if you experience a similar problem with a later model Ford.
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Old February 16th, 2007, 03:00 PM   #2
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Just ask! I could have told you. Oh, and when you spray, (use the straw) put it into the outer edge of the "latch", shoot it streight down, and hold up on the outer door handle while working the latch mechanism open and closed with a screw driver. 10 to 15 times and you should be good to go for a year or so. Less if you live/drive on dusty roads.
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Old February 16th, 2007, 03:02 PM   #3
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

P.S. the door light switch just pops in and out of the bottom of the latch. No need to replace the entire latch.
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Old February 16th, 2007, 03:15 PM   #4
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

OK. I bought my truck used from my brother. It had been lightly wrecked. He fixed it himself. The airbags didn't come out or anything like that. He used to do paint & bodywork/collision for a living. Anyway, he also replaced the ABS controller so now the (ABS) light stays on. Is there a way I can turn it off? My airbag light comes on sometimes, too. I should probably have that checked.
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Old February 16th, 2007, 03:22 PM   #5
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

ABS "99.5%" of the time is the speed sensor in the rear axle. Just pop it out and check it with a Ohm meter. If it shows "O.L" or open, replace it. IF that is the problem, the light will reset it's self. BUT did your brother replace the HCU or the ECU part? The ECU might need to be programmed so that the PCM, and GEM can "talk" back and forth. All three of these modules are networked as only th ABS actually gets the speed signal. It then sends the info to the others for 4x4, and speedo opperation.

As for the air bag, check the connection at the "Pass side deactivation" switch. Othet that that, more info is needed.
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Old February 16th, 2007, 03:38 PM   #6
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Even before I posted I thought "I bet Ray-Dean is all over this" since from what I've gathered it's a pretty common issue and that you probably see this a lot.
I lost my straw for my WD and was too lazy to drive over to my storage unit and scrounge for another so I just sprayed it up in there.
And with working the latch - just be sure you've reopened it before closing the door - ouch!
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Old February 16th, 2007, 03:43 PM   #7
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

thats why it's best to use a screw driver
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Old February 16th, 2007, 04:01 PM   #8
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

[QUOTE=Zee]I have a '99 F150

I found your problem!
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Old February 16th, 2007, 04:12 PM   #9
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Old February 16th, 2007, 04:52 PM   #10
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Here's their new slogan .....




Ford. So well designed that our engineers and master techs drive Volkswagens.




I like it.
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sliding volksrod discount, depending on how much i like you.
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Old February 16th, 2007, 04:58 PM   #11
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

At least we know that Ray will never get layed off
I'm just kidding with you Ray
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Old February 16th, 2007, 05:09 PM   #12
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Quote:
Originally Posted by bswilly
Quote:
Originally Posted by Zee
I have a '99 F150
I found your problem!
Be sure to remember that if you ever need a tow.....
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Old February 16th, 2007, 06:44 PM   #13
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Quote:
Originally Posted by Ray-Dean
ABS "99.5%" of the time is the speed sensor in the rear axle. Just pop it out and check it with a Ohm meter. If it shows "O.L" or open, replace it. IF that is the problem, the light will reset it's self. BUT did your brother replace the HCU or the ECU part? The ECU might need to be programmed so that the PCM, and GEM can "talk" back and forth. All three of these modules are networked as only th ABS actually gets the speed signal. It then sends the info to the others for 4x4, and speedo opperation.

As for the air bag, check the connection at the "Pass side deactivation" switch. Othet that that, more info is needed.
OK, I have no idea. He replaced some cylinder-type thing on the left side under the hood?? Shit, I sound like a woman. It had a crack in the housing from the accident. He didn't think it would be a problem but he replaced it anyway. I don't think the light was on before he replaced it. The ABS works ( I found that out a couple weeks ago) it's just the light is annoying being on all the time.

Where is the Pass. side deactivation switch? It's an '05 and I guess it has a sensor in the seat since the "airbag deactivated" light comes on when my 7 yr old sits up front.

Should the air-ride compressor be real noisy on a 99 Expedition Eddie Bauer? It's also starting to get hard to start some mornings. My brother said it couild be the coil packs on the firewall? He said it's common and they're a PITA. Any thoughts?
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Old February 16th, 2007, 07:23 PM   #14
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Air ride being noisy? Meaning that the pump is noisy when running? Usually it's the rubber isolator pads on the bottom of the pump and not the pump.

Ummmm. Coil packs on fire wall? A '99 should have 8 coils. One per plug. (hence the name Coil On Plug) unless it is a 4.6 (in which case there are two coils that mount on the very front of the engine up near the valve covers.) Neither of these will cause a Ford to not want to start in the cold. (a diesel doesn't have ign. coils so lay off) The most common thing that will cause a Ford to crank over fine, but not start in the cold is th IAC valve. (Idel Air Controle). Basically it's a controled vac leak at the intake. The port injection doesn't have a choke, thus if your foot is not on the throtle when starting, no air is getting into the engine.

DON'T think I'm telling you that you need to hold the gas down to start a fuel injected vehicle. I'M NOT. The IAC performes this tack (on a Ford that is). BUT! IF the IAC sticks closed (no air into the engine at start) it is possible to hold the gas peddle to the floor and start the engine. It may not idle at all, but it should start. If that is the case, on the back center of the upper intake, there will be a round, silver part. One end will bolt to the intake and the other will have a two wire plug on it. That is the IAC. Try tapping if with a wrench. I SAID TAP! Not beat the shit out of it. The engine should start, and run fine after this. The heat from the engine will warm the IAC and you shouldn't have a problem until the next morning.
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Old February 16th, 2007, 07:40 PM   #15
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

The expedition has the 5.4. I could have misunderstood what my brother said about the coil packs. I'm not a mechanic by any definition of the word.
I'll check into the IAC. It doesn't have to be cold weather for it to not want to start, just cold engine.

The air ride is noisy sometimes, not all the time. I don't drive the expedition very often ( I personally don't like it) but I think it's only when it's airing up, like when you first start it or after closing doors and moving a few feet??

Thanks.
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Old February 16th, 2007, 07:44 PM   #16
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Let me know if you need any more things to confuse you.


Some guys know computers. Some guys know baseball stats. Some guys know the measurements of every porn chick there ever was.

Me, I know Fords.
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Old February 16th, 2007, 07:53 PM   #17
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

I don't know shit!! My brother is pretty knowledgeable with Fords. He had an F-450 sitting at the house a while back and was trying to explain to me at what psi or temp or whatever the wastegate opens or something like that. He was just rambling off shit like crazy and I was just standing there nodding my head and saying 'uh-huh" every now and then.

He's big into flipping F-series trucks and mustangs for a profit. He buys a lot of late models wrecks and rebuilds them. I mean nice, too. No hack jobs. He used to race mustangs and has had no less than 100 easily and no less than about 50 F-series trucks. Seriously.

He knows a lot about them but I'm family so it's kind of hard to get him to do stuff for me. I don't blame him really. I should be working on my own shit and not expect him to do it just because he's the resident Ford guy. Although, he did buy a Jetta GLI a few years back and I had to go help him on it.
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Old February 16th, 2007, 08:45 PM   #18
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

my wife's 95 Ford f250's motor is crap,It needs to be replace after only 244 thousand miles.What a pile
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Old February 16th, 2007, 08:48 PM   #19
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Yeah. And #1 piston skirt cracked fucking up the cylinder wall of my '81 300 Six after only 342K. Those things never last!
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Old February 16th, 2007, 08:54 PM   #20
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

What really sucks is I had to put a water pump,clutch and brakes on It.Seems like It would just keep going with no repairs .O and the Plastic radiator cracked And I had to epoxy It.
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Old February 16th, 2007, 08:55 PM   #21
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

The thing that impressed me most about my '89 F-150 with the 300-6 was when I was pulling a 16' trailer with three pallets of sod on it and the truck didn't strain a bit. Stopping it was another story though. I wish I could find a pic of it, looked like a candy cane, red & white with lots of pearl.

I sold it and bought a Toyota truck The 26 mpg beat the hell out of 13-14 mpg but still. What made it worse was that the guy that bought it lived four doors down and never drove it. he just detailed it and it sat in his yard so I had to look at it every time I drove by. Beautiful truck, it was.

Oh, it was my brother's personal truck when I bought it from him. I've only owned two F-150s and I bought them both from my brother.
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Old February 16th, 2007, 08:59 PM   #22
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Default Re: O/T - 97-03 Ford F150 'Door Ajar/Dome Light' problem and solution

Mine is a golden brown with white pinsrtipes. F100 short bed step side. The last year of the wood floor beds.

I'm thinking of putting my 429 ThunderJet in it....
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