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Immobiliser Relay... Ooops

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Llewelyn_ Posted a lot Hi everyone :) Posts: 1,975	Immobiliser Relay... Ooops Llewelyn_ @funkula
	Feb 7, 2013 21:19:53 GMT Select Post Deselect Post Link to Post Back to Top
	Hi all Looking for a bit of electrical advice really... Have a pic of her in her new home where she will be spending the next month or so.... img.photobucket.com/albums/v298/Delorean/72F2A951-CDD2-4F54-8F75-0FB57F7C002D-566-0000012E5F448F20_zpsc288e970.jpg We stuck her on the jig so she can be easily wheeled about and access is a bit better First job on my 911 and I'm stumped already! Basically today I started to remove a load of old aftermarket/non factory wiring which included badly a wired stereo harness and an old meta alarm/immob that was out of use and had been for some time. I wanted the wiring to be as clean as poss so I was carefully tracing everything back and removing the stuff that is definitely redundant. However, the non stock relay which drives the fuel pump has somehow ended up being disconnected (I can't think how ) and the car won't start... It wasn't wired great - There seemed to be two grounds to the relay among other things. The car has the old style inline fuses with screw terms at either end and I can't work out where the cable goes from the fuse and am basically very confused. What I want to know is what feeds will go to the relay, and what is the easiest way of testing the wires I have available so I can rewire the relay? I've looked at the Haynes manual wiring diagram but it doesn't really help me! Any advice appreciated ... Or if you are in Leicester and fancy having a look with me I can happily accomodate with tea and biscuits Cheers!
	Last Edit: Feb 7, 2013 21:20:59 GMT by Llewelyn_ "Back off man, I'm a Scientist" - Dr. Peter Venkman

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squonk Part of things Posts: 858	Immobiliser Relay... Ooops squonk @squonk
	Feb 8, 2013 16:24:06 GMT Select Post Deselect Post Link to Post Back to Top
	This is a question that cannot be answered without seeing the problem. Who knows how the aftermarket kit has been wired in!! All you can do is methodically trace what you have and draw it out. Then decide the best way to re-wire it to get it as close to original as possible. Get hold of a cheap multimeter and a test light to help you out. Haynes manual wiring diagrams are usually a compromise to cover many different variations on a theme. If you can get hold of a factory wiring diagram it would help you out immensely.
	2004 Chevrolet Avalanche Z71 2005 Mercedes CLK320 Cabriolet 1996 Mercedes C180 Elegance Auto Saloon 1996 Rover 620Ti (Dead fuel pump) 1992 Toyota HiLux Surf 1987 Range Rover Vogue (Rusty) 1992 Range Rover Vogue SE (More Rusty) 2006 Chrysler Grand Voyager 2008 Corsa 1.4 Design

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nomad Posted a lot Posts: 2,948	Immobiliser Relay... Ooops nomad @nomad
	Feb 10, 2013 21:28:18 GMT Select Post Deselect Post Link to Post Back to Top
	Feb 8, 2013 16:24:06 GMT squonk said: Get hold of a cheap multimeter and a test light to help you out. ^ WHS Have you found the relay that controls the fuel pump? Any immobiliser / alarms on the car? Apologies if you're a granny and I'm teaching you to suck eggs her, but... Relays have 5 terminals and have standardised ID numbers next to each terminal 85 & 86 are interchangeable : 1 is earth 1 turns relay "on" when you connect 12 volts to to (normally when you turn the ignition key or turn off your immobiliser) * you should hear a small "click" when it turns on, if you don't get that, suspect either bad earth or you're not getting power (check with test lamp or multimeter) .. or possible the relay has died byut that's unlikely if it was ok before you started rewiring * cheat! find which terminal is earth and connect a 12 volt lead to the other terminal - not practcal for driving but should get the motor running ;D the other terminals are the on & off for the pump circuit : 30 is fused 12 volt supply from battery / fusebox 87 is connected to 30 when relay is "off", not connected when "on" 87a is not connected to 30 when relay is "off", is connected when "on" (I might have 87 & 87a backwards ) * check you have 12 volt to 30 (if there's no feed - there can be no power for the pump - check fuses and wiring) End result is you need to get 12 volt to the pump, shouldn't be too hard if you have a test lamp / multimeter, and a length of wire (connected to battery or cig lighter) that you can use as a "12 volt feed" to get things working blue = from ingintion switch red = pump circuit funny sign on left = earth Pic of an actual relay have fun, shout if stuck ;D
	Random picdump for your entertainment forum.retro-rides.org/thread/197691/womble-ing-improvising-photo-diary?page=8 Selling up - Italjet 50cc Minibike and more : retrorides.proboards.com/index.cgi?board=othrmod&action=display&thread=125072 Working without broadband - replies may take a while.

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Llewelyn_ Posted a lot Hi everyone :) Posts: 1,975	Immobiliser Relay... Ooops Llewelyn_ @funkula
	Feb 11, 2013 9:48:25 GMT Select Post Deselect Post Link to Post Back to Top
	Mate - That info is great!!! I was basically annoyed with myself because I started the job late in the day and had no meter on me at the time, my girlfriend was ringing me up pestering me to come home and I guess just wanted a moan! I have now sorted out the issue, managed to trace the wiring and put it back to factory without killing myself or setting the car on fire The Haynes manual wiring diagrams were surprisingly accurate too!
	"Back off man, I'm a Scientist" - Dr. Peter Venkman

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bortaf Posted a lot Posts: 4,549	Immobiliser Relay... Ooops bortaf @bortaf
	Feb 11, 2013 13:11:40 GMT Select Post Deselect Post Link to Post Back to Top
	Most haynes manuals since the 80 have been a direct copy of the factory manual, tha days of haynes actually buying a car and stripping it down are long long gone so they usually are pretty good. Glad you sorted it anyhoo
	R.I.P photobucket

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