Hi. I'm having problems with the central locking on the passenger doors. The key fob remote will lock all the doors but will not unlock any except the tail gate. You have to use the key to manually unlock the drivers door and then open the rest of the doors with the internal lock catches. That was OK for a few weeks until the rear passenger doors will not unlock at all. Stripped the door trim off and replaced the locks with secondhand items with no change. Exchanged the door wiring looms again no change. Actually that's not entirely accurate, the doors did work and then decided not to work on the internal catches again. At no time did I get the doors to work off the remote though. I'm thinking the central locking module is operating the deadlocks to lock the doors but won't unlock them. Or is the drivers door lock making this all occur? All the doors make noises when the remote is activated but there doesn't seem to be enough power being provided to actually make the servoes work. Any ideas? Klaus you were a star with your advice with a previous problem I had. - Gus

In all of the messages pertaining to your problem, there wasn't any mention of confirming that you had a good battery in the key fob. I had much the same problem with my remote locking system in my '98 V70 several months ago, and the kicker was that I got a noise from the locks but no action. As strange as it must sound, the system was fine - it just wouldn't work unless there was a good, strong signal out of the remote. My troubleshooting included a couple of 'new' batteries, right off the card, but it turned out that these just didn't have the voltage. I went to Radio Shack, got one which I was reasonably confident was fresh, and no problem since then. My RF expertise is too sparse to be able to explain it, but that's how she went. Hope that this helps a bit.

Garth.

Search " gus_boy" in this forum for a thread dealing with this problem - there's quite a commentary on the subject from several contributors.

I tried to use the Brickboard email program to send you the 850 trouble shooting guide, but it didn't work. Check your profile's email to make sure it is OK before I complain to Jarrod.

The 850 had 2 fuses to make everything work, check yours. Also check the battery for voltage using the the clips that attach to the battery posts, not the posts themselves. It should be very close to 12V.

You might want to check the lock/unlock switch in the driver's door, it may be corroded and need cleaning. I do not believe the problem exists outside of the driver's door.
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Common sense trumps a PhD

Thanks Klaus. That's great. My money is on the door then as the locks do work, I can hear them trying to work so some power must be getting to them somehow. I'll have a look at my profile to see what stopped you being able to send me that e-mail - Gus

It is not your profile, Jarrod will fix the system tonight. When he does, I will send you some reading material.

Klaus
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Common sense trumps a PhD

Thanks Klaus. I got the problem solving sheet. Since replacing most of the locks the central locking works intermittently but most of the time doesn't work but at least the rear doors aren't remaining locked. I replaced the drivers door lock and the wiring loom in that door but still no joy. The problem solving sheet makes reference to central locking relays but I can't find these on the car. They are certainly not in either of the fuse boxes. I have a feeling the problem is in the whole central locking/alarm module which is just not providing enough power to the door lock motors to make them unlock, they click and make noises but won't actually unlock. I'll keep you posted. - Gus

The relays are under the dash on the driver's side. I forgot which ones...
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Common sense trumps a PhD