Sounds like there are a lot of SCS-Frigetted KES out there. Maybe they all use the same coach wiring (17 pin connector).
If you have combo lock next to your front door, then you will likely have 1 extra wire that connects to Pin #17 on your wire harness. And if you do not have a combo lock then Pin #17 will be a no connect (NC).
KES CONSIDERATIONS:
1) We decided to buy the Avital 3100 off Amazon, but you can use any keyless entry remote. .
* We found you can re-use the outer frame of your existing SCS-Frigette black box to hold the Avital KES in place.
* Just gut your old SCS mother board by splitting the case... and then use the outer shell to hold your new Avital KES in place.
* You will need to file the Avital down a bit to fit inside, but who cares. The important part is that you can mount your new Avital box against the rear metal wall using the same holes your SCS box used... right where it should go.
* Just drill a hole for your Avital antenna to fit.
Purchase suggestions:
Avital 3100XL:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Siren:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Relay with wire harness included:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Fuse holder: (You only need one or two)
https://www.amazon.com/10-Pack-EPAut...5ZR7R3VSY9ESGT
2) We also liked the small fobs in this Avital unit. They fit easily in our pocket.
3) We did not hook up the "horn" function because you can hear the fob lock and unlock your doors. And we did not want to hear the "chirps" when using the fob. And we did not want to wire another relay to enable this function.
Remember... all those tiny wires are mill-volt leads that need a relay to switch 12v power. So don't worry if all those sires on your new KEY look cheap.
4) You need to add 2 relays to your front door open function, because the SCS-Frigette KEY was designed with onboard relays to pulse 12v to open your door plunger. But your new Avital KES has low voltage outputs. So you need to add 1 relay for the "open" function; and a second relay for the "lock" function... and if I remember the front door plunger is
"negative" edge triggered. So you need to wire your relay to compensate for this. (Not hard. You just need to know relays can be wired a number of ways. See our installation guide.)
5) We did buy and mount a Siren on the outside of the wire compartment. (Just drill a hole and fish a hot wire through... being sure you add additional tape round the part of the wire that goes through the hole to prevent vibration from shorting the wire out in the future. WE ALSO LIKE HAVING THE SIREN... and have on occasion used the "Panic" button on the fob to scare away skunks. Works well for other critters (and people) too.
6) We are not a fan of having to hold down 2-buttons on the fob at the same time to "LOCK" the corgo doors. And you don't have to enable this option on your new KES if you don't want to, but it is a plus.
If you elect not to wire your new KES to lock your cargo doors you can always use the lock button just inside your entry door.
Note: Universal KES remotes do not normally have a Trunk-LOCK function, because most trunks are manually shut. However, you may be able to program your Avital so that 1-button will lock the cargo doors. We did not go this route, because we found the Avital Installation Instructions to be VERY, VERY difficult to follow.
7) We recommend you read the tread we referred you to above... and then download the .pdf for information on how to add additional relays to your set-up to enable your Universal KES.
8) The best part: You can unhook your existing wire harness and nothing in your RV will be affected.
* This means you can use the wire conversion table we provide in our Installation Instructions to build a wire harness on your bench... with that mess of additional relays you will add.
** And don't be surprised if your SCS-Frigette label has different names to describe your pin functions. ...Trust me, they perform the same function. They just make it hard to understand for the average RV owner. VERY HARD. This is why no one has proposed a conversion table for over 15 years! (Not to toot my own horn, but I'm pretty proud of myself for coming up with one! And I'm no expert on car alarm systems.)
Besides, you can't hurt your existing wires if you make a mistake so long as you pay attention to your system (trigger) setup either being "+" or "-" trigger. And even then I don't think you can hurt your system because relays protect it. That's why they say, you if your door operate backwards you can just reverse polarity and they will work properly.
9) YOU WILL NOT USE ALL OF THE WIRES available in the Avital wire harness. These are for remote start and other functions you will not need.
Help For Pre-2004 Winnebago w/ SCS-Frigette Keyless Entry System aka Winne #102756-03
The picture blow shows the Avital 3100XL box stuffed inside the old SCS-Frigette outer shell... with a rats nest of relays we added for just the front door operation. However, if you want to enable the lock and unlock your cargo doors your will have 2 more relays, we did not show in this picture. (Note: The Cargo doors are 12v positive edge triggered. Just apply a momentary 12v pulse to your cargo door wire and it should open with out a relay, but you should add a relay anyway to protect the circuit for shorting out your KES in the future.)