Pete, I read that post and didn't really find any solid info. Thanks for the info Jeff, I ended up using my DMM to figure it out. After blowing 5 fuses, I got some solid info for you guys, here goes:
To connect a tripminder computer to an '88 TC, you will need the following:
-Tripminder computer out of a Crown Vic or similar, specific models listed on
www.CoolCats.net
-Spool(s) of 14 gauge wire (plural if you want to use different colors, this is prefered)
-Solder & iron, at least a 90W gun
-Wire strippers/snippers
-Sharp razor blades
-Philips screwdriver
-10mm 1/4" drive wratchet or wratcheting box end (preffered, makes things easier)
-7mm 1/4" drive socket or set of small Torx bits
-Super glue
Disconnect the battery.
Now that we've gathered all of this junk together, we can start! Remove the passenger side kick panel. Pull the extra wiring out of the way to expose the EEC and use the 10mm of your choice to remove the 60 pin connector from your EEC. Pop the black protective "cap" off of the connector via the 4 tabs.
You need to locate pin 3 (dark green/white) and pin 34 (light blue/purple). Pin 3 is easy because it is numbered. Pin 34 can be difficult, but remember it is in the middle, between pin 14 and 54. Pin 54 is a solid red wire, so just look for the light blue/purple wire behind pin 54 (red wire) and you've got it.
Be sure to use multiple colors of wires and remember which is which. WRITE IT DOWN.
Now you will need to splice into these wires. The way I did it was cut a piece of insulation off, wrap the end of one of my 14ga wires around it and solder it. Then I taped them up. The hard part is done! Put the black cap back on and screw the connector back into the EEC.
Now drop these wires for a second and lets get to the clock. Take the dash trim off by removing the screws that are hidden up under the lip. You will need to remove the two panels on the bottom where the light and fuel switch is to get to some hidden screws for the dash trim. After this is removed, remove the clock. It is a 7mm 6 point socket or a small Torx bit. The 7mm socket is easier for me, but not everyone has one. I guess not everyone has Torx bits either? lol
The clock has a 4 pin connector on it consisting of a brown wire, dark green/light green wire, white/purple wire, and a black/light green wire. Set this aside, don't lop the connector off just yet. Now is the time to run the wires. Take the two spools of wire you connected to your EEC and run them up to the clock from behind the glove box and dash. Run them to where the clock harness is and you can then cut the wires, unless you want a whole spool behind your dash.
From here on out, its just a matter of connecting the wires, which I have drawn a very simple diagram for. The wire colors for your trip computer may not match, but its the pin pattern that counts. The wiring in your dash harness should be exactly what is on the diagram if you have an '88 though.
http://natomessageboard.com/uploads/0000...uter88.JPG
After you get it all wired up, all thats left is swapping the brackets from your old clock to the new tripminder. I popped mine off and super glued them on. Then toss your panels back together and enjoy the mileage!