John.Taylor
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| posted on 18/4/06 at 08:21 AM |
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Sierra EFi Loom...
Over Easter weekend I started to remove the loom from my 1989 Sierra 2.0 OHC Efi
Starting at the back, I have freed the wiring for the petrol tank, rear lights, rear heated screen, rear courtesy light, parcel speakers, rear doors,
rear ABS sensors, front doors.....then I removed the dashboard.....whoa, what a lot of wiring!
It's got me in two minds as to whether to continue or whether to buy a loom, a few answers to the following questions might help me out:
1.) Has anyone used the Sierra's ABS wiring on an MK Indy / Other build (sensor location must be an issue here so I'm assuming not many
people have, but I would be interested in hearing if anyone has)
2.) Is the ABS loom separate? It has it's own computer (near side bulkhead) but I can't trace the wires fully.
3.) Along the same lines, are there any separate looms that can be unplugged wholesale and left in the car (e.g. the heater, air conditioning,
electric windows, etc.)
4.) Again along the same lines, can the ignition / engine management & running / warning lights loom be taken out of the Sierra independently? I
could then make up a custom loom from whats left in the Sierra for the lights, heater, windscreen wipers, radio, etc.
5.) Anybody know if Premier Wiring do a loom for an EFI Pinto and what bits I would need out of the Sierra to suplement it, e.g. ECU, relays, etc.
Also, is there any advantage of going down this route now, baring in mind that but for a days work, the loom is labelled up and nearly out of my
Sierra?
Any advice would be appreciated.
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nick205
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| posted on 18/4/06 at 08:41 AM |
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John,
I used a non-ABS, non-EFI SOHC Sierra Saphire as a donor. The wiring loom was obviously less complicated than yours will be, but still far to complex
and bulky for me to use in the Indy.
I spent far too long removing the whole loom in tact and labelling everything, then decided to buy a Vikki Green loom from lolocost for £75 designed
to work with the Pinto. It was easy to install and the right size, with no unwanted connections. I retained the engine wiring loom from the donor,
which I suggest you would need to do as it is already the right size and has all the necessary connectors on it.
IMHO your build willl be over complicated, very time consuming and a pain in the arse if you try and use the donor loom.
HTH
Nick
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John.Taylor
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| posted on 18/4/06 at 09:52 AM |
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This is exactly my problem.
If I had a non-efi, non ABS, base model I'd do the same as you. But I'm not sure whats included in the (or even if Vicki Green/Premier
Wiring do) off the shelf looms for the EFI.
My Efi Ghia has 5 ECU's dotted around the bulkhead. One is for ABS, one is labled up 'warning lights', one is the main cpu which I
assume does the engine management, but I can't figure out what the other two do (mounted below the A-pillars just in front of the front door at
low level) unless I label up and remove the loom entirely.
If I completely remove the loom and strip back the black tape, I'm sure I could trace and cut out lots of waste (ABS??, elec windows sunroof and
mirrors, A/C, heating, interior lghts, heated windows & mirrors, central locking, trip computer??, door/boot/bonet ajar warning panel, etc.)
What I really need it someone who's got an EFI loom/EFI engine to tell me what they did.
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nick205
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| posted on 18/4/06 at 11:15 AM |
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Try Mark Allanson's archive and a quick U2U - he's used an EFI Pinto on his car
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phoenix70
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| posted on 18/4/06 at 12:52 PM |
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I've got a Efi Pinto in my MK, and I used a PWS loom. I did start stripping the sierra loom out, but after wasting a week and not really
getting anywhere I decided to just go and buy one. The Sierra loom is so long there are so many wires that you don't need.
The Efi part itself is really quite simple to remove and splice into the new loom, there are very few connection between the efi loom and the rest of
the loom (mainly some earths and an ingition feed)
I think trying to use the ABS system would be difficult, although my donor didn't have abs. I don't think you will find it that easy to
seperate system out wholesale.
That's my 2 pence worth, bottom line grab the efi section of the loom and bin the rest.
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Ketchup
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| posted on 18/4/06 at 01:29 PM |
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i have used an efi loom myself, it did take a few hours but i have removed everything i didnt need and the ignition part of the loom is very easy to
separate btw, i have to admit it would have been easyer to just buy a loom, but for sake of a couple of hours i still think it was worth doing, plus i
am tight 
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John.Taylor
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| posted on 18/4/06 at 02:19 PM |
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Thanks for the advice. Looks like I'll percevere for another day, then look into taking out the EFi side and buying in the rest if all is not
well.
If anyone else has tried either route, please feel free to comment.
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