IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Door lock problems

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

phidoe2000
Posts: 19
Joined: Wed Jun 27, 2012 5:22 am
Year and Model: 98 V70XC
Location: FL, USA
Has thanked: 0
Been thanked: 0
phidoe2000

Re: Door lock problems

Post by phidoe2000 » Thu Jun 28, 2012 11:41 am

Looking at the assembly, the spring is compressed when the door is in the un-lock position, so I'm thinking that for the motor to unlock the door, it has to push against the spring, effectively loading the spring. It appears that the spring assists the motor in fully engaging the lock when it's in lock mode. Is it possible that with age the motor simply doesn't produce enough torque to work against the spring regardless of replacing the resistor? Time will tell if there are any issues with the spring being removed. Ken



User avatar
rspi
Posts: 7242
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 18 times
Been thanked: 38 times
United States of America
rspi

Re: Door lock problems

Post by rspi » Thu Jun 28, 2012 8:23 pm

@ Jimmy: You da man Dog!!! I had taken one of those motors apart a little over a year ago and knew that the motor was weak but didn't understand why. I even took the thing around town asking people at plasces like model train stores but they never mentioned anything about a PTC.

I picked up another spare latch today. I'm about to tear it apart and see what I can do. I also got a piece of coper wire from a building site. It's about 6" long, I figured I could fix a few motors with it. ;)

Here is the post I did on it last August: http://volvoforums.com/forum/volvo-s70- ... post283855


'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

User avatar
rspi
Posts: 7242
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 18 times
Been thanked: 38 times
United States of America
rspi

Re: Door lock problems

Post by rspi » Thu Jun 28, 2012 9:14 pm

@ Jimmy: How did you get the motor open? This little thing is tough (the 2 wings bent into the plastic top).


'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

User avatar
rspi
Posts: 7242
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 18 times
Been thanked: 38 times
United States of America
rspi

Re: Door lock problems

Post by rspi » Thu Jun 28, 2012 10:02 pm

Ok, I have the motor open, when I look inside I don't know what I'm looking for. This one is all black inside.

The motor has a couple of clips that hold around the shaft. Then there is two flat sides of the motor top, the plastic part. The motor casing was secured on the round ends of the motor. Then, one of the flat sides has the clips coming from it. If you set the motor down with the motor towards you, the gear shaft away from you and the thing that holds the clips (that hold the shaft) up (the motor contact pins down), there is a flat metal piece to the right that does pull out. The piece I removed is 1/4" x 3/8", is this the part that needs to be replaced?


'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

User avatar
rspi
Posts: 7242
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 18 times
Been thanked: 38 times
United States of America
rspi

Re: Door lock problems

Post by rspi » Thu Jun 28, 2012 10:22 pm

@ Jimmy: Is this the part that needs to be replaced?
PICT7913.JPG
You do not have the required permissions to view the files attached to this post.


'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

jimmy57
Posts: 6414
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 2 times
Been thanked: 184 times
jimmy57

Re: Door lock problems

Post by jimmy57 » Fri Jun 29, 2012 1:03 am

That is it. The square wafer is the PTC. If you use an ohm meter it likely will read 22-25 ohms. It should be 2-4 ohms.

I guess you found the right something to bend the dimples out to get the end case off.
I hammered the end of a 10 ga. single conductor wire and cut it to the right length.

Volvo and others LOVE those PTC's. The headlamp wipers that stop in random places and later on will be parked where they belong are suffering from PTC issues as they have the PTC to protect motor from ice/snow issues. I fixed wipers on my 95 960 since they are easy to get out. The ones on my 98 XC need PTC bypass surgery but the dang motors are a pain in the butt to get out.



User avatar
rspi
Posts: 7242
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 18 times
Been thanked: 38 times
United States of America
rspi

Re: Door lock problems

Post by rspi » Fri Jun 29, 2012 5:11 am

I went by a home construction site yesterday and got a piece of the wire yesterday. I have a ohm meter but don't really understand what I'm doing when I use it. Lol. I thought more ohms was better.

I ended up grinding the dimples away with a small screw driver and scissors.

Getting the latch casing open was pretty easy by heating up the seam with a lighter. I also have one of those small lighter torches that would likely work good as well. I'm going to glue it closed with a little super glue.


'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

User avatar
rspi
Posts: 7242
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 18 times
Been thanked: 38 times
United States of America
rspi

Re: Door lock problems

Post by rspi » Fri Jun 29, 2012 5:29 am

Last question for me on the door latch. Are the latches swapable from front to rear? I know the rear latches have the child latch switch but other than that is it ok? I think the angle may be a little different because I had a little trouble getting the handle to stay in the latch after I installed a rear in the front. (I grinded off the child lock switch).


'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

JRL
Posts: 9351
Joined: Tue Nov 22, 2005 2:07 pm
Year and Model: Several
Location: 19333
Has thanked: 0
Been thanked: 11 times
United States of America
JRL

Re: Door lock problems

Post by JRL » Fri Jun 29, 2012 6:45 am

No
Each latch is different, all 4


2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

Contact info for purchases: [email protected]

jimmy57
Posts: 6414
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 2 times
Been thanked: 184 times
jimmy57

Re: Door lock problems

Post by jimmy57 » Fri Jun 29, 2012 8:27 am

No to super glue. Super glue works when the surfaces meet perfectly. Use silicone since the lock case should be a weatherproof seal.



Post Reply