For everyone who wants to convert over their analog DIC to a digital one, today I successfully did this modification in a 2002 Pontiac Grand Prix SE 3.1 V6. A fellow forum member, Yourpappy, gave me a ton of great information on his post
here and I also used wiring diagrams from mitchell ondemad. You can download them here:
Guage Cluster/DIC wiring 1 of 2
Guage Cluster/DIC wiring 2 of 2
Analog DIC connector end view
Digital DIC Schematic
Analog DIC Schematic
I ordered my Digital DIC from Ed Morad's auto parts ebay store. It costed $65.00 including shippind and it came with the spare plug and wires. It is in very good condition and I would totally recommend anyone who needs parts to contact him. Here is the dash before modification. Just a plain old analog DIC, Nothing Special.
First I disconnected the battery's negative cable. Next comes disassembly of the dash. This is pretty straight forward. Just remove the lower kick panel by taking out the two 7mm screws and gently pry up to release the snaps. Then pop off the dash bezel. This is also held in by snaps, its easiest to start on the left side and work your way to the right. Remember to disconnect the fog light switch. Now you will have to angle the dash bezel out by tilting the steering wheel all the way down. Its kind of a hassle, but it can be done, just be gentle. The Analog DIC is removied by gently depressing the snaps on each side to release it.
Next it was a matter of finding all the wires needed by the Digital DIC. Most of them are at the Analog DIC already, but here are a few pictures taken by Yourpappy of where the others are located.
These two show where the Data Line can be found, be VERY VERY carfull splicing into this one.
Yourpappy also found an auxilary power source for his constant B+ voltage needed. I couldnt find it maybe because I think he did this mod to a GT and I'm doing it to an SE. In my case, I had an aftermarket deck installed with a wireharness from wal-mart that plugs directly into the factory one. I used this harness to get my B+ and my grey and black wire from the interior lights system. Here is a picture of Yourpappy's auxilary power connection.
Here are some pictures of where Yourpappy and I spliced into to get VSS signal. (Photos compliments of Yourpappy)
Here is how I chose to connect to each of these wires. I first sliced a little of the casing off with a razor blade then I wrapped my wire around, applied some flux, soldered it together, and taped it with black electrical tape.
Once I had VSS, DATA, B+ Constant, and Lights wires ran, it came time to cut the old analog DIC out and install the new one. I also soldered all these wires, but this time used heat shrink tubing. Here is a picture of me just getting the process started. It was pretty easy just matching wire colors, but I mainly relied on Yourpappy's info from his post along with the wiring schematics available above.
Here is a picture of all the wires soldered together.
When I got to this point, I plugged it in and made sure everything worked. I then wrapped everything in black electrical tape.
Finally everything has to be reassembled in the reverse order it was removed. Here are a few pictures of the digital DIC in and working, and the car put back together.
Well, thats it. Looks pretty good huh? It went pretty straight forward like I thought it would. Took me about 2 and a half hours, but I was pretty meticulous with everything. Only had to do it once because there were no problems.
If you are doing this modification to an SE or GT you need to order a DIC with a "TRAC" button instead of a "TCS" button. I heard that these two are not interchangable and that the one with a "TCS" button is only used in GTP's.
I'd like to thank Yourpappy for the help with this, and also Ed Morad for such a great price on exactly what I needed. Now my Girlfriend is happy that she is one step closer to having a GTP like mine. Thanks Everyone!!! Good Luck.