For anyone that ran into this problem doing the double din swap, I'll start this off by saying you're welcome. :beer:
It was a known issue that while doing the conversion one simply could not just wire up the 01-04 switch to the corresponding 94-00 wires. The reason being, the 94-00 defrost switch carries a relay inside of it while the 01-04 just switches on an external relay. So me being me, having a dummy switch was not in the least bit acceptable. With some patience, experience with small electrical, and the right tools you can easily do this. Now on to the fun part...
Firstly, you'll need to disassemble your 94-00 defrost switch, I used the smallest flat head screw driver I could find to pry up the sides that hold the pieces together. Once apart, you will be left with this.
At this point get your soldering iron plugged in and heated up. Next you'll need to remove the small black push button. Upon inspection, the black button on the circuit board is essentially just a compact version of the 01-04 button. So we're just going to swap the two.
This is held on by 2 leads on the button itself and 3 support pins. They make a V shape.
With a desoldering iron it's pretty easy to just heat up one pin at a time and remove the solder. Once removed, I soldered in two roughly 6" pieces of wire where the two leads for the button were. These wires are what will activate and deactivate the defroster. The right wire will connect to pin 1, and the left connects to pin 2 on the 01-04 switch. (Vice versa if you flip the relay over :-D)
That takes care of 2 of the 5 wires, now solder a 6-8" wire onto each of these three locations.
And you should end up with this... These three wires are for switch illumination and grounding (I used heat shrink on pretty much everything to clean it up a bit)
You may or may not have the connector for the 01-04 switch, I was lucky and they happen to come with mine. Another option would be using small female terminal connectors.
Here are the diagrams I used to determine what wires went together.
(01-04 switch)
(94-00 switch)
I twisted the corresponding wires together and did a test.
(Defrost OFF, notice the LED's off)
(Defrost ON, notice both LED's on)
(Defrost ON with the headlights on to show the green LED)
And that's it! I trimmed down some areas of the original button case and removed the springs on the side so it'll slide into the original location far back enough to conceal with a 01-04 instrument cluster bezel.
(Before)
(After)
(With relay inside)
All that's left to do now is extend the 5 wires from the relay to the location of the 01-04 switch. Hopefully this saves someone from a lot of wrongful splicing and soldering like I did at first. It might be a slight pain but it's worth it to have functioning buttons. Feel free to PM me regarding any questions or concerns. :beer:
It was a known issue that while doing the conversion one simply could not just wire up the 01-04 switch to the corresponding 94-00 wires. The reason being, the 94-00 defrost switch carries a relay inside of it while the 01-04 just switches on an external relay. So me being me, having a dummy switch was not in the least bit acceptable. With some patience, experience with small electrical, and the right tools you can easily do this. Now on to the fun part...
Firstly, you'll need to disassemble your 94-00 defrost switch, I used the smallest flat head screw driver I could find to pry up the sides that hold the pieces together. Once apart, you will be left with this.
At this point get your soldering iron plugged in and heated up. Next you'll need to remove the small black push button. Upon inspection, the black button on the circuit board is essentially just a compact version of the 01-04 button. So we're just going to swap the two.
This is held on by 2 leads on the button itself and 3 support pins. They make a V shape.
With a desoldering iron it's pretty easy to just heat up one pin at a time and remove the solder. Once removed, I soldered in two roughly 6" pieces of wire where the two leads for the button were. These wires are what will activate and deactivate the defroster. The right wire will connect to pin 1, and the left connects to pin 2 on the 01-04 switch. (Vice versa if you flip the relay over :-D)
That takes care of 2 of the 5 wires, now solder a 6-8" wire onto each of these three locations.
And you should end up with this... These three wires are for switch illumination and grounding (I used heat shrink on pretty much everything to clean it up a bit)
You may or may not have the connector for the 01-04 switch, I was lucky and they happen to come with mine. Another option would be using small female terminal connectors.
Here are the diagrams I used to determine what wires went together.
(01-04 switch)
(94-00 switch)
I twisted the corresponding wires together and did a test.
(Defrost OFF, notice the LED's off)
(Defrost ON, notice both LED's on)
(Defrost ON with the headlights on to show the green LED)
And that's it! I trimmed down some areas of the original button case and removed the springs on the side so it'll slide into the original location far back enough to conceal with a 01-04 instrument cluster bezel.
(Before)
(After)
(With relay inside)
All that's left to do now is extend the 5 wires from the relay to the location of the 01-04 switch. Hopefully this saves someone from a lot of wrongful splicing and soldering like I did at first. It might be a slight pain but it's worth it to have functioning buttons. Feel free to PM me regarding any questions or concerns. :beer:
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