tapping into ignition feed relay

[adyw]

I'm trying to put in three new power feeds to supply coil packs and edis 8,
I've taken the car apart e.g fuse box off the bulkhead and found what I believe is the ignition feed relay I can find again what I believe is the outputs, by trial with a volt meter.

The question is has anyone elce done this or see any issue if I tap off these connectors to give me the supplies, I'm worried about buring something out.

[chrispitman]

To make things easier you could always use the MAIN relay this is the one on the flying loom, normally two the other is Fuel Pump. The fuse box is a nightmare to work with if you insist on this route contact 'spend' he has done a great drawing of the box wiring/pinout

[adyw]

Thanks,
relay box out now so might as well continue

[rev-erend]

I used the main 'loose' relay too.. just use a volt meter with the black connected to the battery and test each of the terminals to see which has a 12v only when the ignition feed is on. I used crimps on mine but solder is just as good.

[cinquecento]

Adrian..

I have justed finished MSIIing my Griff.. fantasic experience.. and now you can learn from my mistakes.

I'd install a new relay near where you will put the ECU.. that way you'll have +12V for the MS, an EGO controller, an EGO digital display if needed and to the coil packs. That what you have a single supply and it's easy to trace if something doesn't work. I took +12V in the loom to the 14CUX to drive the relay..

Good luck

[GreenV8S]

I always (OK, twice!) use a separate new loom that takes 12v and switched ignition feeds from the main car loom and provides the fuses and relays to power the ECU and the fuel pump/lambda heaters/injectors/coils. I think this is a lot safer and easier than trying to cannibalise the existing loom.

The MS guys actually do have a relay module that takes care of all of this but to be honest I didn't like the look of it, there were exposed PCBs and cables with no strain relief, looked to me like a problem waiting to happen.

Edited by GreenV8S on Wednesday 30th April 14:51

[adyw]

Is the main loose relay man enough, I am looking for 4 new power feeds and am worried about over loading it

[adyw]

Ok I think understand the relay thing now I've had time to think about it.
am I right in saying then.

If I had a small relay box itself linked to the battery directly, but used say the main relay to turn it on and off a (normal make and break relay), I could then, if the new relay was rated at the correct amp's I could get all the supplies I need.

[chrispitman]

Yes, just use the switch ignition lead from the Main relay on the flying lead to switch a relay for all your equipment. IF you take a feed off the battery make shure you fuse it less or same as the relay rating, and cable rating.