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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Central Locking DeadViews : 666 Replies : 11Users Viewing This Thread : |
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Mar 23rd, 2021, 22:33 | #1 |
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Central Locking Dead
Hi guys,
New member and relatively new 940 owner here. I own two Volvo 940s, a 1995 940 S n/a manual and a 1997 940 Celebration LPT manual. My ‘97 940 has had an issue since I bought the car I’m struggling to diagnose. The central locking is completely dead. Each door locks fine manually but it’s as if the central locking is non functional. I have swapped the central locking relay with my ‘95 940 which has fully functional central locking and did not fix the issue. fuse 2 is also working fine which I believe protects the central locking circuit. Any ideas where to look now? I am relatively unfamiliar with the 940s but gradually learning. If anyone has any pointers for any common fixes to this issue I would be much appreciative. |
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Mar 23rd, 2021, 23:23 | #2 | |
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Mar 24th, 2021, 08:25 | #3 |
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Nope, it’s not operative on any door. My ‘95 940 only works on the drivers door too and I figured that was normal. Perhaps there is an issue with both!
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Mar 24th, 2021, 09:10 | #4 | |
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I'd imagine the switch to operate the C/L in the driver's door is faulty. |
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Mar 24th, 2021, 09:40 | #5 |
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Mar 24th, 2021, 10:16 | #6 | |
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As mentioned above, chances are the drivers door switch (built in to the lock motor assembly) could well be faulty or have lost its earth connection. Just to clarify, it will neither lock from an unlocked state nor unlock from a locked state with central locking?
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Mar 24th, 2021, 11:13 | #7 |
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Hi guys, thanks for the suggestions. I’ll be sure to give some a go tonight and update.
@Laird Scooby, correct, it will not lock from an unlocked state or unlock from a locked state. This is the same with any door. The only way I can describe it is as if the central locking system is completely dead. I will have a good look tonight to see if I can see any loose connections anywhere. |
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Mar 24th, 2021, 11:30 | #8 | |
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Mar 24th, 2021, 12:10 | #9 |
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If you open the driver's door do you get any clicking from the locks?
I ask because I thought my central locking was faulty some years ago but if I held the door open at a certain angle it worked. In my case the wiring loom in the door jam has a few breaks in the wires which needed splicing.
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Mar 24th, 2021, 17:32 | #10 |
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No it makes absolutely no sound at all. No clicking. I tried the doors at numerous angles as suggested but still no life in the central locking system.
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Tags |
central locking, electronic, key, loom |
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