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Omex 600 ECU relay help
keybaud - 15/5/15 at 06:47 PM

I have moved the relay for the Omex 600 ECU, but I may have wired it up incorrectly. Has anyone got one that they can describe or send me a picture of. The relay uses 5 connections as follows:

Blue/white cable. This is the switched earth and I know where this goes (85)
Single thin red terminated cable.
Single thick red cable in loom
Double, thick red cable in loom
Triple red cable, 1 thin terminated, 2 thick in loom.

I know one of the termations is the 12V feed (30) and one is the switching connection (86), but I don't know if it is the single or the triple cable connector and I don't know which ones go on 87 and 87a. I have recently rewired the car, so can't play with them until it works, as I don't know if it will work!

This is the ECU relay itself and not the fuel pump relay or anything else controlled by the ECU.

[Edited on 15/5/15 by keybaud]

peter030371 - 16/5/15 at 03:25 PM

You can download the manual from here which has some wiring info in it http://omextechnology.co.uk/page11.html#EngineManagement

keybaud - 16/5/15 at 04:45 PM

quote:
Originally posted by peter030371
You can download the manual from here which has some wiring info in it http://omextechnology.co.uk/page11.html#EngineManagement


Thanks, but I have the manual and the actual wiring doesn't align with the drawing at the back. The manual implies the relay feeds the coil, injectors and lambda probe, but from the loom, which used to work, the 87a and 87 relay connections either feed the coil or the injectors and lambda sensor, but not all three at the same time! I think I have a problem elsewhere as well, but I need to wire up the ECU correctly before I can diagnose any further. I'll probably speak to Omex on Monday, to see if they can help.

keybaud - 21/5/15 at 09:52 PM

*Embarrassed cough* Wrong relay type *Embarrassed cough*

Now I know there are changeover, double make & break and twin make break relays. I used a changeover, but needed a double or twin, so power was provided to both outputs when operated.