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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 118
Location: Poole


PostPosted: Sat Feb 23, 2019 11:18 pm    Post subject: Wire from engine bay to dash Reply with quote

Hi all,

I need to get a single wire from the engine bay to the dash for a little project. Wondering if anyone knows of a spare wire in the wiring harness that I could use?

Or if anyone has a wiring diagram to help me find one.

The other option would be to run a new wire, but not liking the thought of having to remove the rear shelf, seat and carpets to get one in if I can do it the other way.

Any help would be greatly appreciated.
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993 Carrera
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Endoman
Barcelona


Joined: 11 Apr 2011
Posts: 1341
Location: Bolton U.K.


PostPosted: Sat Feb 23, 2019 11:40 pm    Post subject: Reply with quote

I used one of the spoiler raising wires when I put the fixed wing on to intercept a reverse signal for the Becker. You could run a wire along the inner sill following the main engine harness feed but as you say it's not easy and you've got all that glue to contend with.
If you look at the l/h fuel rail there will probably be some unused connectors cable tied to it. They are on my non vram car not sure where they go though. There may be a cruise control loom, rare on UK models but common in the States.
I've retro fitted Vram, obc and 3rd brake light a lot of the wiring was already there. Negotiating the wiring diagram is fun.
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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 118
Location: Poole


PostPosted: Sun Feb 24, 2019 12:00 am    Post subject: Reply with quote

I'm thinking of using the wire for the fan belt sensor as I'm not using that. But can't find any wiring diagrams as yet to see if that's possible 🤔
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Endoman
Barcelona


Joined: 11 Apr 2011
Posts: 1341
Location: Bolton U.K.


PostPosted: Sun Feb 24, 2019 12:16 am    Post subject: Reply with quote

I found the wiring diagram online via a Rennlist post. You need volume 7.
it's like unravelling spagetti. Your suggestion should work, if you pull the clock look for same colour code wire. All at your own risk of course I managed to kill a radio once.
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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 118
Location: Poole


PostPosted: Sun Feb 24, 2019 2:37 pm    Post subject: Reply with quote

Thanks Endoman, will go searching on Rennlist.... I could be a while Smile
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decgraham
Barcelona


Joined: 17 Sep 2008
Posts: 1336
Location: Spain


PostPosted: Mon Feb 25, 2019 7:34 am    Post subject: Reply with quote

Hi andyobro,

I have a wiring diagram which I used when I needed to get additional wires from the ECU to the back of the car for installing my CAT (my car was without a CAT as it ran on leaded fuel in Kuwait) The file is too big to load up but if you send me a PM with your email address I'll send it to you if it will help.

ATB Smile
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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 118
Location: Poole


PostPosted: Mon Feb 25, 2019 8:01 am    Post subject: Reply with quote

That would be amazing, thank you 😁
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Citori
Kyalami


Joined: 09 Oct 2010
Posts: 1825
Location: Rural Essex..

1996 Porsche 993 Carrera 2

PostPosted: Thu Feb 28, 2019 8:33 am    Post subject: Reply with quote

Don't be phased by removing the back shelf etc, if you need to. It really isn't a hard job at all.
I have done it a couple of times to get to the wiper motor relay. It doesn't help that I'm over six feet and have cram myself in the back, but it's only four screws and a couple of seat belt bolts IIRC.
Good luck.
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Previously enjoyed Porsche:
1996 C2 Coupe.
1983 911 Carrera Targa Sport.
1981 911SC Sport.
1978 911SC.
1970 911E.

I have CDO. It’s like OCD, but the letters are in alphabetical order, LIKE THEY ARE SUPPOSED TO BE..

Aircooled or nothin....
 
  
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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 118
Location: Poole


PostPosted: Thu Feb 28, 2019 12:04 pm    Post subject: Reply with quote

Thanks to Endoman and Graham for the wiring diagram leads.

Had a good look through the diagrams, but no clear route from engine to dash of any unused wires, everything seems to go through the control units under the seat.

So decided to run my own wire. As Citori says, the rear parcel shelf comes out pretty easy, 4 visible screws and the lower seat belt bolts, undo the speaker wires and its out. Getting the screws back in is not so easy as it is blind to get the screws into the speed nuts behind. I found a very good torch helps.

There is a large grommet just behind the carpet on the LHS (facing back of car), peel the carpet back a bit to see. I popped a small hole in the grommet and popped my wire through inside some wiring sleeve. I then ran the wire in its sleeve just under the rear armrest panel (no need to remove) just lift and push under. I then removed the plastic carpet trim along the bottom of the door shut. There is enough room to run one wire in a sleeve under here safely. Popped that back down and then just routed up to the dash behind the little panel in the foot well.

I would want to run more than one wire this way as not enough room under the carpet trim, but decided I didn't want to take out the seat and start lifting the carpet for just the one wire I needed.

Mission complete Smile Thanks for your help.
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