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Old 02-12-2009, 01:26 PM   #1
rotor-man
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Seat belt pre-tensioners

Can someone explain or show a picture of a seat belt pre-tensioner. I have a Focus that has the airbag lite on , put in new airbag, but was told that the RCM module might be bad and that the seat belt pre-tensioners need to be replaced also to get the Idiot lite to go off.
Thanks for your help.


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Old 02-12-2009, 02:58 PM   #2
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I have no picture but I can tell you where they are. They are indletween the drivers and passenger fron seats. There is one on each seat and it looks like a metal tube about the size of a 3"AA" cell mag lite. They are near the seat track. They are also the things that make retreiving anything dropped between the seats a pain in the butt!
If you are going to romve these things keep in mind that they are explosive devices and can do some serious harm if you try to probe one the wrong way and set it off. When they detonate they shorten the seatbelt buckle by a good 8 inches almost instantly. Chances are the wiring going to one of the may have become damaged.
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Old 02-12-2009, 03:18 PM   #3
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Thanks Ken, would the seat belt on the driver's side not having the "Retracting Click Sound", like all the other seat belts in the car possibly mean that only that pre-tensioner is bad?
Thanks for any help.
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Old 02-12-2009, 03:54 PM   #4
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Not always. if you wear setbelts regularly the one in the drivers seat will get the most wear. As long as it operates properly and is not all frayed out it is most likely OK. Start by checking all the wiring under the seats
Has your car ever been in a crash before? That will mess em up for sure.
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Old 02-12-2009, 06:45 PM   #5
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If an airbag goes off, it will also blow the seat belt pre-tensioner on the same side.
You'll need a new one.

It's easier to just buy the seat belt latch with the pre-tensioner already installed.
In fact, I don't think there's much of a price difference.

The airbag light will go out once you get the new latch/tensioner installed.

For a good price...
Get a hold of Mike Trendel (b16sir1991 on FF) at Hilbish Motors.
He is a vendor on this site, and has his own forums:
http://www.focusfanatics.com/forum/f...splay.php?f=94
NOTE!
Calling him will get much quicker results than posting a thread or sending him a PM.
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Old 02-12-2009, 07:06 PM   #6
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Quote:
Originally Posted by rotor-man View Post
Can someone explain or show a picture of a seat belt pre-tensioner. I have a Focus that has the airbag lite on , put in new airbag, but was told that the RCM module might be bad and that the seat belt pre-tensioners need to be replaced also to get the Idiot lite to go off.
Thanks for your help.

The most important question is "what year model is your car?" For the 05-07 cars the pre-tensioners are in the door posts, in the unit that rolls up the belts-- not in the latches on the seats like in 00-04. Also, sometimes (but not always) a blown pre-tensioner will disable the retractor from rolling the belt up. So if you've got a belt that's not rolling up it may be that one.
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Old 02-12-2009, 07:58 PM   #7
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^^^Wo...thanks for the info.
I had no idea the pre-tensioners were changed in the later models.
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Old 02-13-2009, 06:47 AM   #8
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Thanks for all the help. The car is a 2008, also does the RCM module also need to be replaced and where would it be located, I've looked all over with no success.
Thanks
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Old 02-13-2009, 10:22 AM   #9
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Quote:
Originally Posted by rotor-man View Post
Thanks for all the help. The car is a 2008, also does the RCM module also need to be replaced and where would it be located, I've looked all over with no success.
Thanks
rotor-man, I haven't gotten my hands on an 08 yet, and I know they're very different on almost everything. But in the older versions it's under the center console, forward of the e-brake and aft of the shifter.
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Old 02-13-2009, 03:11 PM   #10
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Why'd they relocate them (pre-tensioner) anyway?
Seemed like a logical place to install them on the latch, so it wouldn't let loose in case of a crash.
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