self parking front wiper control

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Alan 480
480 Is my middle name
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self parking front wiper control

Post by Alan 480 » Sun Jul 29, 2018 11:14 am

Am I correct in assuming the self parking feature is controlled by the CEM in LHS?

trying to get the headlamp washers to work and oddly enough now the front wipers stop moving when turn them off :-( (or when wash wipe they park 'anywhere'

as it happens the 'wipe whilst held' feature seems to be only way to get them to park at bottom of screen, even when the headlamp wash feature disabled (ie I pulled the plug) they still just stop wherever, so not a happy bunny

and to make matter worse the head lamps don't even wash but as I'm not running HID or LED etc then can't see an issue (especially when I've removed the plumbing, so 'not fitted' . .. . . )

rear window is OK
Alan

480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1

jifflemon
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Re: self parking front wiper control

Post by jifflemon » Sun Jul 29, 2018 12:38 pm

Would have to double check, but typically on wiper motors, the self parking is part of the motor.
Typically it'd have a live or igniton feed which loses it's earth when the park position is reached.

Shall head off and look for some wiring diagrams as that feed may be being controlled by the CEM

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brinkie
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Re: self parking front wiper control

Post by brinkie » Sun Jul 29, 2018 1:42 pm

From memory, as I have borrowed my technical manuals to my Volvo mechanic:
CEM only controls intermittent wiper speed and rear wiper. The front wiper is fully functional even without CEM. Wiper motors work like Jeff described.
Robert.

Present cars: 1994 Volvo 480 GT 2.0i, 1999 Volvo S70 2.5 Europa, 2010 Volvo V70 2.0F Momentum

Alan 480
480 Is my middle name
Posts: 1489
Joined: Sun Aug 28, 2011 9:03 am
Location: Aberdeen

Re: self parking front wiper control

Post by Alan 480 » Mon Jul 30, 2018 11:40 am

I'd though that as well ie self park was switched within the assembly/motor, but took cover off and about five wires running to the motor assembly, then a pair across to the motor to actually do the driving.

I have a hope then if controlled within the motor, it will just be a limit switch, just co-incidence it happened when trying to get washers to work (which are only require don post 2009 ), should have checked that first :(

getting into switch might prove 'interesting'

had a look at HBOL and appears that there are THREE relays that control the wipers all on the top of steering column area, so some investigation will take place, assuming I get a healthy MoT in next few days . . . ..
Alan

480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1

Alan 480
480 Is my middle name
Posts: 1489
Joined: Sun Aug 28, 2011 9:03 am
Location: Aberdeen

Re: self parking front wiper control

Post by Alan 480 » Sat Aug 04, 2018 3:19 pm

upate.

HBOL is accurate (as in the L standing for 'lies' )

mine is a 93 and the diagrams say '480 to 91'

and '480 92 on'

but i can confirm that with a 93 built car (wiring looms etc have '93 stickers ) it is controlled via the CEM

good news is that pulled the unit out from foot well, removed from plastic tupperware box and plugged all the connectors back in

it works as it should!!!
so put PCB back into box, plugged in connectors and wriggled back into place , only using the rear screw as the connector obscured vision of the other screw . ..

my kind of fix :-)
Alan

480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1

eye of ra
Can tell where the 480 was built
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Location: Derbyshire

Re: self parking front wiper control

Post by eye of ra » Fri Aug 17, 2018 12:22 pm

Glad you fixed it.

For future reference been through my wiring diagrams and it appears (assuming I’m not missing any) that the front wipers wiring never changed, except losing the “kick-down to continuous wipe” feature.

So for all years the Normal Speed is not controlled by the CEM but Intermittent, Single Sweep, Kick-Down and Fast Speed is (although diagram is not clear about Fast Speed so it may work without CEM). However the return/park sweep is controlled by both the CEM and the switch in the motor.
Current:
480 ES Auto 1989
480 Celebration 187
480 ES Auto 1991
CLK430 Conv 2001
Hyundai i10 2015

Alan 480
480 Is my middle name
Posts: 1489
Joined: Sun Aug 28, 2011 9:03 am
Location: Aberdeen

Re: self parking front wiper control

Post by Alan 480 » Fri Aug 17, 2018 6:08 pm

OK to be fair to HBOL, there are THREE wiring diagrams, viz

440 / 460 to 1991
480 to 1991
then
440 /460 1992 on
and nowt for 480 1992 on :(

so 'wrongly' assumed it was a typo/omission and they'd merged the 440/460/480 into a single harness, and just not connected the short part of loom required for the headlights . .. . .

any way in the case of 'not parking' the CEM was still the main culprit, and I could hear/see the relays on the main PCB in operation :-)
Alan

480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1

eye of ra
Can tell where the 480 was built
Posts: 355
Joined: Tue Dec 04, 2012 7:33 pm
Location: Derbyshire

Re: self parking front wiper control

Post by eye of ra » Sat Aug 18, 2018 9:10 am

Alan 480 wrote:
Fri Aug 17, 2018 6:08 pm
OK to be fair to HBOL, there are THREE wiring diagrams, viz

440 / 460 to 1991
480 to 1991
then
440 /460 1992 on
and nowt for 480 1992 on :(

so 'wrongly' assumed it was a typo/omission and they'd merged the 440/460/480 into a single harness, and just not connected the short part of loom required for the headlights . .. . .

any way in the case of 'not parking' the CEM was still the main culprit, and I could hear/see the relays on the main PCB in operation :-)
I take it you have the blue D to P reg HBOL as the other two do appear to combine the diagrams and call them “typical”.

If you look at the last few pages of your HBOL it says “Supplementary wiring diagrams (480 models from 1992)” and is the reason I said “assuming I’m not missing any” as I only have a supplementary green book for 1992-on, which does sort of confirm the HBOL but I find it hard to believe that the only differences between 1991 and 1992-on are the few items in is that book (and even fewer in HBOL) bearing in mind model year 93 has the larger fuse box.

Where HBOL does fall down is that there were many changes between 1986 and 1991 which are not mentioned.
Current:
480 ES Auto 1989
480 Celebration 187
480 ES Auto 1991
CLK430 Conv 2001
Hyundai i10 2015

Alan 480
480 Is my middle name
Posts: 1489
Joined: Sun Aug 28, 2011 9:03 am
Location: Aberdeen

Re: self parking front wiper control

Post by Alan 480 » Sat Aug 18, 2018 10:20 am

eye of ra wrote:
Sat Aug 18, 2018 9:10 am

I take it you have the blue D to P reg HBOL as the other two do appear to combine the diagrams and call them “typical”.

If you look at the last few pages of your HBOL it says “Supplementary wiring diagrams (480 models from 1992)” and is the reason I said “assuming I’m not missing any” as I only have a supplementary green book for 1992-on, which does sort of confirm the HBOL but I find it hard to believe that the only differences between 1991 and 1992-on are the few items in is that book (and even fewer in HBOL) bearing in mind model year 93 has the larger fuse box.

Where HBOL does fall down is that there were many changes between 1986 and 1991 which are not mentioned.
aye that's the book I have, the 'supplementary' is mostly engine , ABS, bulb warning etc.
(and any cars I've had are always in the 'grey model year area' where there were changes . . . or not)

I suppose the diagrams are 'indicative' and at least gives you a fighting chance of figuring out wiring colours etc.

PS say a TV prog about the VW Atlas, in it the wiring harness was around 100lbs /50kg, the Regal wiring harness must only be around ten lb!!!
Alan

480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1

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