I was planning to change over to LED bulbs on my Murena. For that purpose I bought an electronic turnsignal relay so I would not have to use cheat resistors. However it won't work, neither with LED bulbs or normal bulbs.
I am wondering if the wiring or polarity for the standard Murena relay differs from others...
Yes, the terminals are not standard and in different positions to normal Jon.
If you have a totally standard Murena and indicator system, and your flasher unit failed, you could not simply plug in a standard new one meant for a normal car! I don't know why they did it, but that's French electrics for you.
The electronic flasher you have is correct and to the normal standard. It is the Murena you need to alter slightly.
It is a 3 prong relay. The red wire (nr 3 on the Murena diagram) goes to "+" on the relay, one white wire go to "C" That is "70" on the diagram, and one white wire goes to "70B".
The red wire is the power, live; the white with red marker (70) goes to the switch; and the white with white marker (70B) goes to the warning light. Since the electronic flasher unit has a positive and negative, you can see that it will not work in that socket as wired. But correctly wired up it will work.
Holding the two relays in the same position The original is labeled C R + and the electronic one, B L E .
Is there anyone who can tell me how the B L E is supposed to connect? Perhaps it is a simple matter of swapping some wires around, but which?
The electronic flasher needs a power feed to B which you have (red wire) and an earth to E which you don't have; and the third connection L goes to the switch (70) which you have. So you need to connect an earth instead of the warning light wire (70B). However, you then have the problem of the warning light. Most cars now have one for each side, but the Murena only has one for both. So this will need to be changed.
The original flasher unit gave a flashing signal to the warning light directly from the unit, but with no cross link. If you try to use the left or right feeds to the same warning light you could get a cross feed to the other side, so you will need to be aware of this and allow for it. One way is to have two diodes and stop the back feed that way. Another is to wire both sides of the warning light one to left and one to right. Then whichever side is flashing it will use the other side to earth and it will work except when the Hazard Warning Lights are on. Since you have a separate Hazard warning that is fine. However, the flasher warning light in the dash uses only one connection and a common earth, so unless you rewired the dash the latter is not easy to. do. Better to have a feed from both sides to that one connection but through a diode to stop a cross feed.
Roy