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Join Date: May 2001
Location: Worcester, MA
Posts: 2,392
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Wow ! Thanks very much for the offer. It is genuinely appreciated. This is really by far the most helpful and generous internet community I've ever seen. However, as it turns out, I managed to find and solve the problem. And the culprit may surprise a few 964 owners. It turns out the central locking module in my 964 is under the passenger seat as jtkkz said. This is odd since my car is a 1989 and should have the unit under the dash. Odd, but who cares, right? I found the box. And I also found that the door lock relays are plugged into the SIDE of the module. DUH !! So one of the relays had come loose and nearly fallen off (probably from road vibrations). So all I did was bend a few blades inward to make a tighter fit and plug the relay back in and VOILA !! The problem was solved.
That's good news for me but who in the world designed a module with relays plugged in sideways? I'm no engineer but even I can tell that this thing is a malfunction waiting to happen. Obviously this was not one of Stuttgart's finer engineering moments. I wonder how this design got past the technical review committee? Anyway, to provide a long term solution, I may try wrapping a rubber band or two around the whole thing to keep the relay in place. Makes me wonder, though, how many critical relays and parts are on the verge of falling off my car. 
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Owner of a wrecked 944 |
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04-19-2004, 06:26 AM
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Location: Manhattan Beach, CA
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Check out this web site (www.systemsc.com) on the Products page for pictures
of the door lock unit & the alarm unit. The 87a pin of the alarm unit provides the input to DME relay to allow starting. If the car was jump started with the jumper battery reversed, the alarm unit will be damaged preventing starting.
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Have Fun Loren Systems Consulting Automotive Electronics '88 911 3.2 '04 GSXR1000 '01 Ducati 996 '03 BMW BCR - Gone |
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04-19-2004, 06:40 AM
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Irrationally exuberant
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I use rubber bands around in the garage to hold boxes closed etc and they weaken and break after a little while. It might be the cold that does it. You might want to find another solution like (quality) masking tape or something.
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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04-19-2004, 06:47 AM
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Registered Loser
Join Date: May 2001
Location: Worcester, MA
Posts: 2,392
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Holy cow, Laren !! That is a cool website. And yes, Chris, you have a point. Maybe I can use some string? Tape has glue which can dry out. I'm really hoping for a permanent solution. I can't believe I went through so much trouble because of a loose relay. Grrrr...
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04-19-2004, 07:04 AM
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06-14-2004, 04:22 AM
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06-14-2004, 04:28 AM
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Registered Loser
Join Date: May 2001
Location: Worcester, MA
Posts: 2,392
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urbanassault - I'm sorry to hear you're having the same problem. Since the alarm system in my car does not appear to be located in the "proper" place for my model year, I am guessing it has been modified by a PO. So who knows what has been done to it? It could be a total hack job. However, I'll definitely go out and take some pics with my digicam of the underside of my passenger seat and maybe we can compare notes. Also, if the relay is plugged in snug, then it might be that the electrical contacts are corroded. Might help to try cleaning them with some sand paper. I just had an awful problem with a dim headlight that was resolved once I cleaned the connectors on the plug.
Also, I tried jumping the wires using the info on this thread but had no success at all. Of course, considering my moniker ("Wrench Klutz"), it may be that I did it wrong. Keep us posted. I'll do whatever I can to be helpful. And there are folks on this BBS who know huge amounts. Since we had the same temporary solution (i.e. holding the spare key in the door), I suspect we may have had similar causes. I'm sure we can figure this problem out. BTW - Any pics of your car? 
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Owner of a wrecked 944 Last edited by Wrecked944; 06-18-2004 at 05:30 PM.. |
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06-18-2004, 05:26 PM
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06-21-2004, 09:42 AM
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Weee! minutes after last post, I got it working! Corrosion on relay contacts. 2 relays located internally in the alarm module. I carefully pryed black cover off and saw black crispy substance on one of the relay contacts, gently scraped with razor blade, works great! Nothing like the feeling when I opened that door and the alarm stayed off!
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06-21-2004, 10:12 AM
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06-21-2004, 10:42 AM
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Join Date: May 2001
Location: Worcester, MA
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Owner of a wrecked 944 Last edited by Wrecked944; 06-21-2004 at 10:58 AM.. |
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06-21-2004, 10:54 AM
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SoCal911SC beat me to it - I second the zip tie idea - doubt that anything will make one of them come loose
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Steve My '85 911 Targa ** Hand painted center caps for sale here RIP Warren PCA & Rennlist member |
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06-21-2004, 11:03 AM
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The Blue Pheonix
1985 Porsche Targa 3.2
