Discovery: RKE100FW door lock module on our Discovery 39R

[Alan24601]

Our electronic door lock system finally quit being able to lock the door while unlock worked. I found the module under the dash screwed to the floor. Replacements were expensive so I researched the relays on the board and found an exact replacement at Fry's for $3.79. Unsoldered and replaced the relay and the module did not work. I found the mounting holes were plated through and the copper was attached to the old part. Only two of the holes need to connect so I added two wires and just ran them over the edge of the board. Locks now work correctly. The relays as shown in my pix from bottom to top are lock, unlock and the third I think is the step light. Easy fix and a big money saver. Frys» Electronic Components» Switches - Relays» #6401162

[Dgreen1069]

How long did your repair last? I don't quite understand what you did with the wires that wrapped over the board. Can you explain that a bit better? I am having the exact problem you have and I was thinking of trying to repair the board. After seeing your post, I'm almost certainly going to give it a try.

[PABO05]

I too have that same issue. Fleetwood wants big$$$.
Call mfg. will not sell to me. Proprietary to Fleetwood.
I will try that fix.

[Alan24601]

https://www.amazon.com/dp/B07T877Z77...roduct_details
This is a $17 replacement for any MOHO electric door latch controller. There are a number of them available on Amazon but I bought this one and it is fully programmed and ready out of the box. If you require a momentary pulse or constant voltage it is a simple change fully explained in the instructions.
Handy for many things so do not pay for an obsolete original system. Great device for sure.

[Dgreen1069]

I found the relay I needed on Amazon for $8.40. The relay was NTE Electronics R46-5D12-12.

I used a soldering iron and a solder sucker to remove the old relay from the circuit board. I soldered the new relay into place and it worked

The solder on the PCB had a high melting point which made removing the original relay a bit harder than I expected. In the end, it took me about 30 min. to make the repair.

Alan, do you have a schematic for the printed circuit board? How did you learn which relays controlled what?

[Alan24601]

I figured it out the hard way, reverse engineering. I find most MOHO stuff is poorly documented when delivered but many of the component manufacturers will provide drawings when asked. Freightliner is great in that regard.