ca18det wiring harness

PukkaSilvia · #1 13-07-2009, 21:55

if no ones answered this before i get home in a couple of days il get some pics and details up of one of my converted looms

30psi · #2 13-07-2009, 23:45

Looks like all you have is the engine harness. I took the power harness out of the S13 too which contains the 3 relays and it plugs in to the engine harness.

If you still have access to the S13 to rob it from it's worth using. All you then have is permanant live, igntion live, an earth to get the engine running.

You could run the whole lot off one relay or just have the relay run the fuel pump but then your subjecting more current demand through the ignition switch of the car which otherwise would just switch on relays with less than an amp being drawn, compared to many more amps the other way.

northerner · #3 14-07-2009, 08:38

After checking and I found the loom that came with the Det engine I got had been hacked. I did however get another full loom which basically covered the whole of the engine. I have found the Relay box from the offside (3 green relays) were the loom goes round the engine bay to the nearside were there is another Relay box. At this end I can see the Brown/Grey connectors you are talking about

northerner · #4 14-07-2009, 09:54

Are you saying I need to strip the Three relays/wires out from the loom all the way to the brown/grey connectors??? If so, I see from the relay box on the Nearside that at least One Blue wire goes into a Blue relay from the Grey connector? Is this going to cause problems when cut or is it just spliced back in ???

30psi · #5 14-07-2009, 10:05

Yeah I remove from that loom the wires I didn't need. I can't remember what the blue relay was for, but I chucked it out.

You'll end up with a number of black and red wires that feed the relays and the loom for you to put permanent and switched power to.

There's also one very thin black wire that needs to be earthed.

northerner · #6 14-07-2009, 19:50

Quote:

Originally Posted by 30psi

Yeah I remove from that loom the wires I didn't need. I can't remember what the blue relay was for, but I chucked it out.

You'll end up with a number of black and red wires that feed the relays and the loom for you to put permanent and switched power to.

There's also one very thin black wire that needs to be earthed.

I kind of knew you were going to say that so as I had the afternoon off. I cut out all the wires for the 3 relays leaving plenty of meat to play with. I did the same with the brown and gray plugs. As I already had a butchered loom I managed to get another green relay (fuel pump). I found the relay box comes apart so I played around and managed to make a block of 4 green relays with three bladed fuses on the end. This makes it more neat to look OE

northerner · #7 14-07-2009, 20:19

I also followed the ECU pin diagram to find out for sure what each wire does on the brown and gray plugs. This is what I found

8 Pin grey plug :
Red/Silver band ECU 12v perm live PIN 58
Blue/Green silver band A/C relay *NOT USED*
Black/White silver band ECU eccs 12v switched PIN 109
Blue/Red Plug loom 12v switched (no pin)
Black/Red Ign power 12v switched PIN 45
White (shielded) Knock sensor (I will wire this in further towards the bulkhead)

8 Pin brown plug
Green/Yellow silver band A/C relay *NOT USED*
Black/Red silver band Eccs power 12v switched PIN 16
Green/Orange silver band Inhibitor relay *NOT USED*
Black/Purple Fuel pump relay PIN 18
(NOT SURE WHICH PIN ON THE FUEL PUMP RELAY)
Black/Yellow ***** Dont know what this is ???!!****
Brown/silver band O2 heater (my ECU plug does not have an 02 wire)

Now I think I have all these correct (if not then say!) but I need to know if my dodgy relay wiring is OK ? Can I run one Permanent Live/One switched 12v/One ground jumped through all the relays ???