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Discussion Starter · #1 ·
STEPS FOR REPLACING MKIV JETTA TRUNK LATCH MICROSWITCH
The following outlines the procedure for replacing the trunk microswitch on a MKIV Jetta (and possibly a Golf/GTI as well). These microswitches commonly fail, causing the trunk light to operate intermittently or not at all. Also, it causes the trunk open light on the instrument cluster to not work. The procedure was based on a 99.5 Jetta GLS VR6 - it may be slightly different on later-models cars (which have the emergeny release inside the trunk).

1. Open trunk lid and remove the carpet lining. There are 13 Phillips head screws which are located approximately where the yellow circles are in the following picture.


2. The screws in the above picture are coated with carpet fibers, so using a bare screwdriver may scratch the coating off. I used a ZipLoc Freezer bag folded in half to prevent this from happening, as shown below. It did a pretty good job of keeping the screw coating intact.


3. Once the carpet lining is off, disconnect the actuator rod from the latch assembly by unsnapping the rod connector (yellow arrow in picture below) and removing the rod from the connector.


4. Remove (2) 10mm nuts (inside yellow circles in above picture) to disconnect the latch assembly from the trunk lid.
5. Flip up microswitch retaining flap on underside of trunk latch assembly (yellow arrow in picture below).


6. After doing so the microswitch should slide right out of the latch assembly, as seen in the picture below. Disconnect the microswitch from its harness connector by pulling the two side tabs outward (yellow arrows) at the same time.


7. You can test to see if the microswitch is bad and causing the trunk light/dash indicator not to work by jumping the two terminals in the harness connector with a small wire. If the trunk light comes on, then the microswitch is bad and needs to be replaced. If the light doesn't come on, then the problem may also be somewhere else (but may be the microswitch as well). Check the bulb (you should really do this first) and the wiring between the harness connector and the light.
8. Install new microswitch and reassemble everything by following the above in reverse.

The microswitch is VW part# 8D5959489 (supposedly there is also a trunk microswitch with part# 8D5959489B which may be used on later-model cars - double check your part#s before ordering). The cheapest I could find it for was $10.95 at Auburn VW (1stVWParts or 1-888-528-5280).
In case someone needs to replace the entire latch assembly, the VW part# is 1J5827505D01C. The cheapest price I've seen it for is $44.76 at 1stVWParts. I'm not sure if the latch assembly comes with the micro, but based on the image below that I found on IMPEX's website, it looks like the latch may come with a micro.


The lock assembly for a GTI/Golf is different. The part number is 1J6827505BB41 and it sells for $22.45 at 1stVWParts.

As always, do this procedure at your own risk. I am not responsible for any mistakes in the procedure or those that you make while performing it.


Modified by VgRt6 at 11:44 AM 6-8-2005
 

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Discussion Starter · #2 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (VgRt6)

Bump for those who didn't see it.
 

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Discussion Starter · #5 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (OVeRide)

Yes, please put it in the DIY.
My next project is the door lock mechanism. Hopefully it has the same type of micro.
 

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Discussion Starter · #7 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (DrivinAJetta)

I noticed that the part# is the same too. My guess is the procedure is very similar.
 

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Discussion Starter · #8 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (VgRt6)

Bump to the top for those who may have missed it.
 

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Discussion Starter · #9 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (VgRt6)

Pics are back online.

Gary
 

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Discussion Starter · #11 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (gabosgab)

I'm pretty sure that the Passat uses the same exact microswitch. It should be closer to $15.

Gary
 

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Discussion Starter · #17 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (ky_jetta)

It sounds like it's either a fuse or more likely a problem with the convenience control module.
Electrical problems are difficult to diagnose over the internet. Hopefully someone who's had a similar problem will respond with an answer. If that doesn't happen, I doubt you'll get much help other than speculation.

Gary
 

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Discussion Starter · #19 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (ky_jetta)

AFAIK, the comfort control module is up under the dash. I've never messed with it other than to add an antenna wire, so I don't know much about it. I have a feeling that this is going to be one of those things that not many people on here have experience with. Consider yourself a pioneer. Good luck.

Gary
 

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Discussion Starter · #30 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (AmandaBeth)

Is the part you need in one of these images?



 

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Discussion Starter · #42 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (Ryan Sickles)

Quote, originally posted by Ryan Sickles »
Bump.
Any ideas to the previous post? Is it even possible to take off the carpet trim with the trunk closed? Only reason I ask is because I've got 150lbs of audio in the way, and it'd take a few hours to remove that stuff.

I'm pretty sure that you can get the carpet off if you climb into the trunk. It may not come off far, but should be enough to grab the release mechanism and open the trunk.
 

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Discussion Starter · #43 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (JEEP VS GTI)

What part are you looking for the actuator or the lock?
Quote, originally posted by JEEP VS GTI »

hmm.. searching for that part now comes up as "Lift gate - Gate and hardware - Lock
Lock 1999 - 2006"
$47.07!!!
hopefully this isnt correct??

^^is this the correct part im looking for? i was told it was a "microswitch/actuator for the hatch of a Golf/Gti", but they have no part number, or year.. i know it doesnt look like the jetta part shown above...?? thanks!!
 

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Discussion Starter · #45 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (JEEP VS GTI)

If the trunk light is not working because of a bad microswitch, then all you need to order is 8D5959489B. Should be around $15 at http://www.1stvwparts.com.
 

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Discussion Starter · #48 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (JEEP VS GTI)

Call up 1stvwparts and ask them if the part number is the same for the GTI. 1-888-528-5280. Ask for Zeb in internet parts.
 

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Discussion Starter · #51 ·
Re: DIY - Replacing trunk microswitch on MKIV Jetta (JEEP VS GTI)

http://****************.com/smile/emthup.gif
 
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