Hi there, new owner here, names Joe.
... the relays that were in the car (ReF 19) appear to be 5 pin relays with the middle pin removed. I bought a couple more of the 5 pins to test my electrics but they don't seem to make much difference, not sure if i need all of the relays in place for it to work.
I will attach pictures of my fuse board and the relay ports that are empty.
If someone could take a picture of their fuse board and label the relays that would be great, also the relays in the drivers footwell and engine bay are missing and I need to know which ones to get.
also let me know if I've missed any relay ports.
Many thanks
Joe
Hello Joe, welcome to Matra 'fun' - often the wiring gets messed about and the next owner has to try to figure it all out! People who modify electrics should provide amendment diagrams or info. so others know what was done, or for even themselves who after many years may have forgotten what they did!
This looks like an early Matra Magic replacement circuit board which has the 4 relays on the top and modern type blade fuses. The original circuit boards had the old type European fuses on the top and the four 4-pin relays underneath, and had tracks in aluminium and were not the best quality. It was silly of Matra Magic to put the relays on top as they stopped the cover being fitted, and you don't need them on top as relays rarely fail so they were better underneath and out of the way. Also it meant their contacts were easily accessible on the top where you could do any diagnostic checks and even switch them on manually to test whatever they operated.
The 5-pin relays you mention are changeover relays. This board only requires 4-pin relays as they are simply on or off. You don't need changeover relays.
This socket is for the flasher relay. It is empty BUT it looks like someone may have fitted another type relay just above and to the right of it. It maybe an electronic flasher relay. Does the car have LED lamp 'bulbs'? Check in case someone has replaced the standard bulbs with LEDs.
The Matra original flasher is non-standard 3-pin so a normal 3-pin won't work unless you move the terminal in the socket to match the pattern required. That may be another reason they put that black relay nearby - they didn't get the right one and found a standard one wouldn't work!
This socket is for the heated rear window relay, as one of the others said. The main supply (large red wire) comes from the front and is often corroded through in the multi-plug and socket under the windscreen washer bottle, so the relay loses its main supply and the rear window heater could not work anyway. Again this is a simple on/off relay so a 4-pin relay is fine.
Finally, as I'm an auto-electrician and have had my 2.2 Murena from new, and I have the original factory electrical diagram drawings, I know that even Matra made some mistakes, and there are other diagrams around with even more mistakes on them, so some years ago I made some accurate diagrams. Also Matra modified the circuits a few times even during the Murena short life, yet there are generally only two diagrams around - one for 1.6 and one for 2.2 cars. That is insufficient for them to suit all the cars made. So I can provide the right diagram for any car if I am given its specification.
Roy