Hello and a blessed Christmas to all. I know very little about electronics but thankfully, there are those who do and are willing to share their knowlege/gift. I have a couple of winch controls that incorporate an RF receiver but I do not have the companion transmitters. Since these devices have very low security requirements and since they have never been activated, I suspect they could be of the type that latches-on the the first transmission they receive. Is this reasonable? In any case, how could I go about finding or creating a transmitter that would work with these units? Is there any way to ‘learn’ a transmitter to my receivers or vice versa? Many thanks.
What is the receiver chip?
Ah, so that’s the cornerstone. Okay, I will find that out asap. Many thanks for your interest!!! 
Hi Leon! Well, there are three candidates. I’ll give you the most likely first: PIC16C54C / 041/P /031731Q and the logo resembles the Motorola ‘M’; then there is a M’SIA 0536 U / ULN2003AG; and finally a ATMEL344 / 93C46 / .PI27 / A
Here’s hoping these are recognizable. Cheers.
Well, the PIC16C54C is a microcontroller (the “M” is for Microchip)
The Atmel 93C46 is an EEPROM (memory) chip
The ULN2003AG is a darlington transistor array (possibly to drive switching devices for the winch control?)
Are there any other chips on board? Perhaps a photo of the circuit board could help. If not, the receiver may be a discrete circuit as opposed to a dedicated receiver chip – This may make it hard to find a suitable Tx other than something straight from the manufacturer.
Leon, I can’t see the makings of a discrete circuit; there’s just one transistor, one rectifier, two 12 V relays and a variety of capacitors, resistors and diodes. Do those car-starter systems have the receiver built into the antenna assembly?
Hey, Leon! That’s where the BRAIN is!! Much more nano circuitry up there! Try this number: T358D XDLR. If this isn’t it, then it is indeed a discrete circuit. Cheers.