760 Intermittent wiper Mod - may fit other 7/9xx - Page 4

bob12 · Feb 22nd, 2020, 19:05

1) Yes Dave, when I last stripped the tank out to replace one of the pumps some 4/5 years ago it and all the pipes were sparkling clean after Oxy treatment. More recently I have had to unblock the jets much more often. I have a length of suitable pipe to assist soaking the engine bay.

I have also noticed that even my spare top-up bottle stored in the garage out of the sunlight now develops floaters after a few months. I think the 'blossom' must settle to the bottom of the tank where it is immediately picked up by the pump suction like it does in my top-up bottle.

The trouble is that you cannot tell what's good or bad these days. I have always used one make of concentrate (CarPlan I think) which was fine until a years or so ago but that's now a problem.

2) Also thanks Jebus ... I always like a slug of meths before I fall off to sleep! What you say confirms my thoughts that the current stuff is crap and unfit for purpose. I was wondering if something could be added to the modern stuff to prevent the problem, or a formula devised to make up some home brew.

Bob

Laird Scooby · Feb 22nd, 2020, 21:53

Perhaps methanol and Flash multisurface cleaner for the detergent.

Volvo_Utrecht · Feb 23rd, 2020, 20:12

If you don’t want anything complicated. You can just use the skandix interval relay

https://www.skandix.de/en/spare-part...wiper/1020840/

I wouldn’t want any loose relays in my relay box

Laird Scooby · Feb 23rd, 2020, 21:41

Quote:

Originally Posted by Volvo_Utrecht

If you don’t want anything complicated. You can just use the skandix interval relay

https://www.skandix.de/en/spare-part...wiper/1020840/

I wouldn’t want any loose relays in my relay box

I think Jim used the relay socket with a bracket on so can be mounted in a convenient spot. Mine was a straight swap.

You can see the "99" relay in the bottom of my relay board.

monkeh · Mar 6th, 2020, 18:13

Just FYI, Did mine today. Took me a while to sort out the pins. I Used an old relay socket froma scrap car so I could test things out.
Those who want to replace the rectangular wiper relay with 6 big pins, Will need to fabricate a little harness to piggyback the relay on.
Pin out as follows

Volvo Socket VW Relay 99

31 ------------------ 31
31b ----------------- 53S
I -------------------- I
S -------------------- 53M
86 ------------------- T
15 ------------------- 15

Enjoy your new washy wipey.

Can someone update the tags in this post so google can find it?
Volvo 940 vw relay 99 wash wipe volvo 740 vw relay 99

Feb 22nd, 2020, 21:53	#32
Laird Scooby Premier Member Last Online: Today 08:43 Join Date: May 2012 Location: Lakenheath	Perhaps methanol and Flash multisurface cleaner for the detergent. __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Mar 6th, 2020, 18:13	#35
monkeh Pain in the backside Last Online: Today 11:43 Join Date: Mar 2007 Location: Newport	Just FYI, Did mine today. Took me a while to sort out the pins. I Used an old relay socket froma scrap car so I could test things out. Those who want to replace the rectangular wiper relay with 6 big pins, Will need to fabricate a little harness to piggyback the relay on. Pin out as follows Volvo Socket VW Relay 99 31 ------------------ 31 31b ----------------- 53S I -------------------- I S -------------------- 53M 86 ------------------- T 15 ------------------- 15 Enjoy your new washy wipey. Can someone update the tags in this post so google can find it? Volvo 940 vw relay 99 wash wipe volvo 740 vw relay 99 __________________ 'Designed by a computer, built by a robot, and driven by a f***ing nutter' '09 XC70 SE - 2" lift, D5 225bhp, poverty spec.

Feb 22nd, 2020, 19:05	#31
bob12 bob12 Last Online: Yesterday 18:36 Join Date: Aug 2006 Location: Woking	1) Yes Dave, when I last stripped the tank out to replace one of the pumps some 4/5 years ago it and all the pipes were sparkling clean after Oxy treatment. More recently I have had to unblock the jets much more often. I have a length of suitable pipe to assist soaking the engine bay. I have also noticed that even my spare top-up bottle stored in the garage out of the sunlight now develops floaters after a few months. I think the 'blossom' must settle to the bottom of the tank where it is immediately picked up by the pump suction like it does in my top-up bottle. The trouble is that you cannot tell what's good or bad these days. I have always used one make of concentrate (CarPlan I think) which was fine until a years or so ago but that's now a problem. 2) Also thanks Jebus ... I always like a slug of meths before I fall off to sleep! What you say confirms my thoughts that the current stuff is crap and unfit for purpose. I was wondering if something could be added to the modern stuff to prevent the problem, or a formula devised to make up some home brew. Bob

Feb 23rd, 2020, 20:12	#33
Volvo_Utrecht Volvo Utrecht Last Online: Today 05:58 Join Date: Oct 2009 Location: Utrecht	If you don’t want anything complicated. You can just use the skandix interval relay https://www.skandix.de/en/spare-part...wiper/1020840/ I wouldn’t want any loose relays in my relay box

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