Vacuum Locks, 1998 VW Cabrio?
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=35339
Printed Date: May 04, 2024 at 8:08 AM
Topic: Vacuum Locks, 1998 VW Cabrio?
Posted By: s4pturner
Subject: Vacuum Locks, 1998 VW Cabrio?
Date Posted: July 10, 2004 at 11:27 AM
I did search first and have been trying to figure this out on my own, but am not finding the info I need. I am working on a 1998 VW Cabrio with vacuum locks, installing a keyless entry and alarm\starter. I have the relays hooked up per the diagram except for to wires. Pin 87a on the first relay is suposed to be hooked up to the lock control wire and pin 30 on the second relay is for the vacuum system. It says to cut and tap into the signal wire from the lock to the pump, for this connection. Well I'm sure I'm missing something because I have 5 wires leading to my pump, red\white, brown, green ( 12v w\ unlock trigger from lock), grey (12v w\ lock trigger from lock) and a green\grey wire that I haven't figured out yet. I have tried all of these wires and seem to not be having any luck except that when you unlock with the keyless entry, the doors lock. If someone could point me to the magical wire, that would be awesome... TIA
Replies:
Posted By: jfk51502003
Date Posted: July 10, 2004 at 1:21 PM
| Power Lock | yellow/red or gray | + | driver door harness in kick | | | Power Unlock | RED / blk or green | + | driver door harness in kick |  |
Posted By: s4pturner
Date Posted: July 10, 2004 at 3:05 PM
Right that is the same info that I have, but does the wire from 87a trap into the power lock and the wire from 30 tap into the power unlock. Do the gray and green wires get spliced together, etc... I was under the impression that there was ONE wire in the car that needed to be cut and then bridged by the relay assembly, not one for lock and one for unlock. The problem is that the diagram calls for a signal wire from the lock to the vacuum. I have a wire for unlock and one for lock. I'm with you on the lock\unlock wires but the diagram seems incoplete for my specific application. Thanks for all your help, anyone else?
Posted By: s4pturner
Date Posted: July 10, 2004 at 4:57 PM
Okay, I decided to try reversing the signal by using a relay. With all the negatives and positives around I got confused. So now the unlock works fine, but my Compustar 2WSS-AS brain is not sending a 12v signal for locking. I am testing the blue\black wire and a positive lead and it hovers around .9v all the time. I have tried looking for other lock leads, but cannot seem to find any others. Is this a situation were the signal needs to be boosted by another relay?
Posted By: jimmeezgolfvr6
Date Posted: July 10, 2004 at 7:49 PM
even though your vehicle has vacuum pwr door locks, you do not need to connect the door locks in that method. for this car, it's simply positive trigger locks and can be found at the driver's kick panel area. depending on the age of your compustar, you may need to add relays. the newest models of compustar only have negative lock/unlock outputs, in which case you will need to add 2 relays with this configuration. then you have to program your compustar for double pulse unlocking.
good luck!
Posted By: s4pturner
Date Posted: July 12, 2004 at 1:46 PM
Well, I tried this and now the car is being difficult again. It seems as though I get a -12v signal with unlock but there is a constant -12v on the lock lead. I don't know if there is something wrong with the compustar or not, but I thought it would only send a 12v signal while it was locking and then show know current. I am going to work on it a little tonigh and try to figure it out, I'll let you know how it goes.
Posted By: s4pturner
Date Posted: July 12, 2004 at 1:47 PM
That is supposed to be no, instead of "know". Whoops
Posted By: dalmyd1
Date Posted: July 12, 2004 at 10:38 PM
s4pturner wrote:
Well, I tried this and now the car is being difficult again. It seems as though I get a -12v signal with unlock but there is a constant -12v on the lock lead. I don't know if there is something wrong with the compustar or not, but I thought it would only send a 12v signal while it was locking and then show know current. I am going to work on it a little tonigh and try to figure it out, I'll let you know how it goes.
just a HEADS UP!!! Most vacuum systems require a longer pulse to lock / unlock. -------------
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