gmenounos
Vendor
- Joined
- Jun 26, 2003
- Location
- Watertown, MA, USA
- TDI
- '99.5 Golf GLS, '01 Jetta GLX Wagon (TDI conversion)
Our 2001 Jetta wagon (TDI conversion) came with two 2-button key fobs. Our other car is a 99.5 Golf with 3-button fobs and I really like having a separate button for the hatch. The wagon doesn't even have a button inside the car to release the hatch and the 2-button fobs are really finicky about opening the hatch by hitting the unlock button twice quickly. Sometimes it works, sometimes not.
I decided to fix the problem by buying a used 3-button fob. The fob I received ended up being the wrong one. It turns out that the PO had replaced the part of the fob that contains the part number with a different one - probably because the chrome key chain piece had broken off. I did a little research and discovered that the correct part number for the 2001 wagon is 1J0959753T for a 3-button fob. (The 2-button fobs that came with the car are part number 1J0959753S)
So I bought another cheap used fob on eBay. When it arrived, I discovered that the seller had listed the wrong part number - it was 1J0959753P.
I was going to send it back but then I noticed that the circuit board on my 2-button "S" key had solder pads for a 3rd micro switch. Probably because VW used the same board for the "S" and "T" fobs. I decided to gut my two incorrect fobs and transfer two of the micro switches to my 2-button fobs' circuit boards. It was fairly easy to desolder the surface mount switches as they only have 4 pins. I then applied a generous amount of flux to the pins on the switches (flux really helps for surface mount parts) and soldered them to the empty pads on each of my "S" boards. I then put the "S" boards into the shells of my new fobs and tried them out. The hatch unlock buttons on each fob worked great so I didn't end up wasting any money on the used fobs - and now I have a pile of fob spare parts.
Here's a picture of one of my "S" boards prior to adding the extra switch:
Greg
I decided to fix the problem by buying a used 3-button fob. The fob I received ended up being the wrong one. It turns out that the PO had replaced the part of the fob that contains the part number with a different one - probably because the chrome key chain piece had broken off. I did a little research and discovered that the correct part number for the 2001 wagon is 1J0959753T for a 3-button fob. (The 2-button fobs that came with the car are part number 1J0959753S)
So I bought another cheap used fob on eBay. When it arrived, I discovered that the seller had listed the wrong part number - it was 1J0959753P.
I was going to send it back but then I noticed that the circuit board on my 2-button "S" key had solder pads for a 3rd micro switch. Probably because VW used the same board for the "S" and "T" fobs. I decided to gut my two incorrect fobs and transfer two of the micro switches to my 2-button fobs' circuit boards. It was fairly easy to desolder the surface mount switches as they only have 4 pins. I then applied a generous amount of flux to the pins on the switches (flux really helps for surface mount parts) and soldered them to the empty pads on each of my "S" boards. I then put the "S" boards into the shells of my new fobs and tried them out. The hatch unlock buttons on each fob worked great so I didn't end up wasting any money on the used fobs - and now I have a pile of fob spare parts.
Here's a picture of one of my "S" boards prior to adding the extra switch:
Greg