[Winegrower]

I pulled the old keypad off the door, carefully yesterday, Tom had suggested using a plastic razorblade to break the seal between the keypad and painted surface to avoid scratching the paint.  The foam seal was really stuck to the paint and adding a squirt of 3M adhesive remover really helped.  I ended up gingerly using a very sharp single edge razor blade which sped up the process.

The new keypad didn't have the Molex connector (according to Essex they were a custom manufacturer's order no longer supplied) so having a couple options, cutting and splicing the 12 individual wires or separating the Molex connector, cutting the wires from the connectors and soldering the new wires to the Molex pins I chose the latter.  First I marked the connector with a sharpie for orientation then identified each of the wire colors and the hole in which it belonged and wrote them down using the wife to verify the colors.  Little appreciated fact:  around 10% of men are red/green color "deficient".  I measured the length of the old cable then cut the new one to the same length then stripped 3/16" off the end of each wire.  Then cut the wires from the old keypad.  I noticed that the Molex connector actually separated into 2 parts, see photo, which allowed access to each pin and did not require a Molex Extraction tool ($25).   Careful extraction of each pin then cutting each old wire at the base of the pin allowed salvage of all the pins.  I threaded each new wire through the proper hole in the Molex base and was able to flux the wire and pin and solder the wire to the pin without adding significant bulk to the pin. This allowed each pin to be reinserted into the base of the Molex connector.  Looking back it may have been possible to solder the pins to the wires then insert them up into the Molex base until they clicked into place.  You might try and see if that works beforehand.  Reinserting the pins did take a little effort because each base hole is constructed of a 3 prong retention system.  Once the 12 soldered pins were inserted the top of the Molex connector was slid over the exposed pins orienting it with the marks previously placed on the 2 parts.  

So the steps in order are:

1. Carefully remove the old keypad and disconnect it
   
2. Measure the length of the cable and cut the new cable to length
   
3. Strip the wires on the new cable
   
4. Document the position and colors of each wire as it enters the Molex connector
   
5. Mark the Molex connector with a Sharpie for orientation
   
6. Cut the old cable
   
7. Separate the Molex connector
   
8. Remove the pins
   
9. Insert the new wires into the base of the Molex connector
   
10. Flux wire and pins
    
11. Solder each wire/pin
    
12. Reinsert each pin into the Molex base
    
13. Reattach the pin shield portion of the Molex connector to the base
    
14. Reattach the Molex connection to the coach
    
15. Reinstall the Keypad
    
16. Program the Keypad
    

Instructions included with the Essex Keypad are very complete and include all the wire codes, function of each wire, and programming instructions.