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post #1 of Old 01-10-2011, 08:14 PM Thread Starter
ImaginaryFriend
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Passenger airbag switch light fix (which turned off cluster airbag warning light)

A couple weeks ago my cluster airbag warning light turned on. I didn't realize it at first, but my passenger airbag switch's light blew out, thus setting off the cluster warning light. Now many folks will say it's the clockspring when the cluster light goes on, but mine has never been wet and my horn and cruise control work flawlessly, so I figured I should look elsewhere first. After a little searching and posting, I was lead to the passenger airbag switch as a possible source of the cluster warning light. Thanks go to Jonny Jeep for providing this information from his 03 FSM body supplement:

Quote:
faulty switch will trigger the airbag lamp in the cluster, resistances found too...

The ACM continuously monitors the resistance of the Passenger Airbag On - Off Switch circuits to identify the switch position and to provide switch circuit diagnostics.

* ON Position: Passenger Airbag On - Off Switch resistance = 175 to 190 ohms
* OFF Position: Passenger Airbag On - Off Switch resistance = 820 to 870 ohms

If the ACM detects that the PAB On - Off Switch circuits are open, shorted to ground, or shorted to battery voltage, it will set Active and Stored DTC’s. When a DTC is detected by the ACM, it will transmit a PCI bus message to the Instrument Cluster to illuminate the Airbag warning indicator.

passenger airbag switch contacts 3 and 6 should be used to measure the resistance. they are the ones that the light green/orange and yellow/light green wires go to.
Alright, so I measure the resistance and all is normal, so the switch portion is fine. Then I start thinking about what happened when the cluster light came on. The passenger airbag switch light flickered a bit, then went out. So I check the bulb's continuity and find out it's blown. Well, an entire switch assembly is around $35-$40 online (plus shipping), so I figure that's not too bad to replace, but why even pay that when I'm still troubleshooting and I'm not even sure that little light working or not will set off the cluster airbag warning light (it does BTW, that's what this little story and write-up is about).

So after spending $1.50 at Radioshack (part # 272-1141) and a few minutes with a soldering gun, I now have not only fixed my passenger airbag switch light, but in turn have turned off the cluster warning light. You will need to strip away the wire insulation on this particular bulb. Radioshack had another bulb without insulation, but it was not in stock at the time and the salesman said it was really tiny compared to the bulb it was replacing. The bulb I used and indicated above is physically the same size as the bulb it is replacing. Not sure of all the voltage/wattage specs of the stock bulb, but the new one seems to be working fine.

[EDIT: RS part # 272-1154 works too and does not require stripping wires - this is what I used the 2nd time]

1) Wedge your fingers under the edge of the console (picture #1)
2) Press the little tab forward on each side (picture #2)
3) Picture #3 shows how the back of the switch has tabs that slip under the console. So you just release the front 2 tabs and slip it rearward.
4) Slide down the red plug lock, and disconnect the switch (picture #4)
5) Unscrew the 3 screws (picture #5) This picture also shows the pins you use for the resistance testing in case the entire switch is bad and not just the bulb.
6) Take a small flat screwdriver and gently pry each side a bit to release the tabs and pull the 2 main halves apart. (picture #6) The green circuit board will slide upwards out of the plastic shell making it easier to work on.
7) Picture #7 shows the two halves, and the two small spots where you'll need to desolder the existing bulb and solder in the new bulb.
8) Reassemble and enjoy a fixed passenger airbag switch light and reset cluster airbag warning light (checks automatically, no need to do anything but turn the key)

I hope this helps. I know it's a bit verbose, but I wanted to provide troubleshooting information along with the fix.

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IMG_2505-web.jpg   IMG_2506-web.jpg   IMG_2515-web.jpg   IMG_2508-web.jpg   IMG_2510-web.jpg  

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post #2 of Old 01-10-2011, 08:15 PM Thread Starter
ImaginaryFriend
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post #3 of Old 05-01-2011, 07:48 AM
hgesell
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Thank you so much for this. I just purchased an 02 Wrangler that had the same issue and once I checked the light it was blown. Instead of a new bulb, I used a 470 Ohm resistor. Problem fixed and should never happen again.
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post #4 of Old 05-22-2011, 11:59 AM
robrgr
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Thank you

Because of your detailed explanation and pictures I was able to purchase the new bulb from Radio Shack for a buck 1.50, solder (since I misplaced mine) and a solder bulb; total cost $10.00. This is a far better price than an over priced dealer.

With very little skill anyone can replace the bulb to complete the circuit which is required for the airbag cluster light.

After about 10 minutes of actual work I must say, thank for your detailed post with part number.

Thank you,

Robert Rowsey
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post #5 of Old 05-22-2011, 01:31 PM
Jonny Jeep
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Well done for solving the problem and doing the write up. Thanks for the credit too.

Online factory service manuals and parts lists - http://www.jeep4x4center.com/knowledge-base/index.htm
If it doesn't work properly, look for the service manual link at the bottom of the page.
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post #6 of Old 05-31-2011, 09:38 PM
sdpritchard
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After fixing the loose connection in the instrument cluster which was keeping my airbag light from illuminating at all, I found out that the cluster light now stayed on and my airbag disable light was out. I also found out that the previous owner had switched off the passenger airbag and apparently forgot to re-enable it since the light didn’t work.

I chose a different bulb at radio shack (part #272-1154) which is a little smaller but illuminates the ‘off’ nicely. I opted for this one because it has circuit board pins rather than wires and the spacing fits the switch module exactly.

Thanks for the great write up.
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post #7 of Old 06-01-2011, 04:35 PM Thread Starter
ImaginaryFriend
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Quote:
Originally Posted by sdpritchard View Post
...
I chose a different bulb at radio shack (part #272-1154) which is a little smaller but illuminates the ‘off’ nicely. I opted for this one because it has circuit board pins rather than wires and the spacing fits the switch module exactly.

Thanks for the great write up.
Excellent. Thanks for the part #. I only went with that particular bulb because it was in stock and the others were not. It wasn't too hard to strip the wires, but a more direct fit is always nice.
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post #8 of Old 08-02-2011, 07:01 PM
TJeep_1999
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Just did this... Awesome write-up! Part number is still the same. Worked like a charm. Thank you!!!
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post #9 of Old 06-28-2012, 05:17 AM
LaBraeCoach
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This is exactly what was wrong with my jeep also. Thanks for the information and yes the part number is still the same.
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post #10 of Old 02-17-2013, 11:30 PM
HONDOK9
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So I have the same problem but my jeep is a 2004 Rubi and doesn't have that keyed switch on the floor console. Now what?!!!

You can have cheap, and you can have quality, but you can't have both!
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post #11 of Old 02-18-2013, 02:46 AM
2004sahara
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Nice work
I am looking to install the switch in my 2004 tj. I have the switch....now i just got to find the plug. Do late model jeep come with the plug needed?
Will my air bag computer need to be re "flashed" ?
Right now I have the fuses removed to turn off air bag when my young fella must ride in the front,,,like when the rear seat is not in the jeep.
Thank you for any and all helpful info.






Has anyone done this mod in a jeep that did not come with the switch?
Right now I have the fuses removed when my young fella has to sit in the front....when the back seat needs to be removed!!!
I read somwhere that the air bag computer will need to be re "flashed" .........can anyone confirm or deny this tid bit of info ?

2004 sahara, 2 inch BDS spring lift, BDS discos, 31bfg at, on ravines.
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post #12 of Old 02-18-2013, 02:47 AM
2004sahara
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fat fingers !!! hahah

2004 sahara, 2 inch BDS spring lift, BDS discos, 31bfg at, on ravines.
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post #13 of Old 02-18-2013, 10:58 AM
Jonny Jeep
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The switch should be just plug and play if you have the loom. I'm not sure where it plugs in though. No change needed to the module.

Online factory service manuals and parts lists - http://www.jeep4x4center.com/knowledge-base/index.htm
If it doesn't work properly, look for the service manual link at the bottom of the page.
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post #14 of Old 02-18-2013, 06:19 PM Thread Starter
ImaginaryFriend
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Quote:
Originally Posted by 2004sahara View Post
fat fingers !!! hahah
???

Are you speaking about the picture above?
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post #15 of Old 02-19-2013, 03:40 AM
2004sahara
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no sir....you miss understand me.

i was typing on my ipod..then it all disapeared, so i re-typed similar message...................then i posted it,,,and it showed up a few lines down.

your fingers do not look fat...... but the bulb, looks alot like mag light bulb.

kind regards

2004 sahara, 2 inch BDS spring lift, BDS discos, 31bfg at, on ravines.
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