SAFC Hero needed

[Lazy-Bastard]

I posted this in the general automotive section but don't really know if that was the right place, so I am posting here again for our local "SAFC hero"

I was having some trouble with the wiring on my AFM plug. There was a dodgy connection somewhere in there which was causing the AFM to die whilst driving along and essentially cutting power cause the ECU thought it was getting no air. So, being the dodgy bastard I am (that's right...not just lazy...I am a man of many talents ), I decided to remove the plug altogether and just hook the 4 wires up to some female spade connectors (if that makes sense).

When connecting back to the AFM I got 2 of the wires mixed up and managed to blow the fuse that the SAFCII get it's power from. The car would turn over, but wouldn't start. It took me a few hours and a couple of rewiring attempts, including pulling the AFM plug apart and soldering the wires back in to realise where the problem was.

I replaced the blown fuse and the car fired up fine and all the reading from the SAFC seem to be fine.

The problem now is that when I turn the car off, the SAFC STAYS ON and I have to pull the fuse (the one that blew before) to get it to turn off.

I suppose I could do some more dodgy wiring to get around the problem, but I was wondering if anyone with some auto electrical experience or someone who is fairly familiar with the installation and functions of SAFCII's could point me in the right direction.

Any help would be much appreciated.

Thanks

[strutto]

Dodgy, dodgy, dodgy...

Did you rewire the power wires (eg 12+ and GND) at any time?

I'm guessing the SAFC is working fine (now that the fuse has been replaced) but you've wired the power for it to constant, not switched...

[Lazy-Bastard]

Nope....the only wires that I fiddled with were the 4 wires that go to the AFM....

Do you reckon there would be a relay somewhere in the 12V line that would, if blown, cause the SAFC to exhibit this sorta problem....just a stab in the dark, cause I have NFI:rolleyes:

Did I mention how much I hate auto electrical stuff....

[krawler]

The relay could have welded the contacts together when you, erm, "****ed up". A dead short on a 12v system draws enormous current (which you can literally weld with) which would quite easily cause the contacts to melt together.

It seems strange the SAFC is stuck on, but nothing else on your accessories circuit? If its a relay inside the SAFC itself, its time to go digging with a soldering iron

[Lazy-Bastard]

Thanks Andrew....here's a funny thing though.....Turn ignition off, SAFC stays on...so I pull the fuse and the SAFC turns off, but I put the fuse straight back in and the SAFC stays off until I turn the ignition back on.....

any ideas?

[Lazy-Bastard]

OH...and the EBC must be on the same circuit cause it's doing the same thing...

[strutto]

Seriously... it sounds wired up wrong...

Can ya take pics of the ECU wiring??

[Lazy-Bastard]

but I haven't touched the SAFC or ECU wiring...how could it have just suddenly happened???

For the moment I have have wired a switch to the fuse concerned and have to turn the switch off and then on each time I turn the car off.

Interestingly when I turn the switch off I hear a click from the ECU area which sounds the same as the noise which used to come from there when I turned the ignition off before this problem started.....this is what makes me think it's a relay problem...but as I said I have NFI when it comes to auto electrics

[Lazy-Bastard]

I will take some pics of the ECU wiring for you on the weekend Adrian, but it's pretty messy in there....so I don't know if you'll really be able to tell from that

[strutto]

OK... My bad... I just reread what you've typed... My understanding now is this...

- You didn't touch any of the wiring going into the ECU... Ever...

- You played around with the AFM plug / wiring until you ****ed it...

- You fixed the AFM plug / wiring...

- Now the SAFC and EBC are borked...

Correct?

The SAFC and EBC both get there power from the ECU, so, I'm assuming you blew the ECU fuse?

It's sounding like a relay problem... Go find that click from the ECU area and replace the relay you find...

If it still does it, you've accidently rewired something to be permanently ground or permanently 12V+

P.S. Never play with auto electrics again...

[Lazy-Bastard]

1. Correcto...me no touchy touch any other wiring apart from the AFM

2. I will try to track down a relay in the vicinity of the clicky noise

3. If I didn't have to I would never have touched anything electrical.....I'd rather have teeth pulled

4. Thanks for the help