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Circuit diagram is useful if one has to have the diff locking on a separate operating switch
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A couple more which had me thinking
Well not very clear I am afraid but most must have a Golf Instruction Manual to view the relevant bits.
Will try again in different form
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Hi Chris, Well thats interesting as I had presumed it did the opposite as on page 73 (89 Instruction manual) 67 (88 instruction Manual) it says the gear lever must be moved into 1st gear to switch off the rear wheel lock then on Page 122 / 113 says engage 2nd or 3rd gear to release lock but also to reintroduce freewheel action 1st gear to be selected briefly, all a bit confusing really. I am just waiting to receive a wiring schematic book for this model so I will be interested to see how all this operates. But as you have indicated it makes more sense for 1st gear to continue with the diff locked. So now I am presuming that going into 2nd or 3rd there will be no further electrical contact and the vacuum will just die away naturally – maybe wrong but I cannot see any switch operation in these two gears. Thanks for your reply Chris – always a minefield of information.
Hi Chris – I thought I had replied to you but cannot find my answer anyway the cost was £358 from Vwheritage. It needed a little fettling around the accelerator nipple hole but it works very well and the engine seems a bit more responsive. Had to drill three holes in the air intake and use 6cm long bolts to secure it as the original spring clip does not fit. The choke cable was utterly useless (c***) had to put it in a vice to get it to move and then it would not operate smoothly – anyway others are available a British made one very good quality with twist and lock. Now almost ready for a MOT after sorting out the reverse light switch – using a GTI one and extending the wiring with a separate switch for the diff lock as before when reversing on a hard surface it would wind up the transmission and suddenly release with an almighty bang which I don’t think does the mechanism any good. Yes saw the pics of the switch you sent, thank you, and I have silver soldered the flat piece which was very worn but just working out how to get the small ‘rods’ out of the rubber seal and change them over as not all of them are used. So nearly there.
Hi Chris – In your other bits would you have a reverse switch – 191 919 823D mine is now not making any contacts for rev lights or diff lock. There are 3 contact ones available which work the reversing lights but not the diff lock also the fitting is different so a bit of jiggery pokery is necessary. ? Regards John
Oh pity – Ordered one yesterday from Vwheritage as I couldn’t find one for sale anywhere else except some Chinese ones. Thanks for the thought anyway. JMac
Hi Chris Well yes all hoses are good and all nipples tight in housing and if I suck on the two nipples on the three point vacuum unit there is no leak there and if I pull off the hose when the plunger has retracted it snaps out quickly to the extended position – I note that these units, new, now cost about £500 !!! My only conclusion is it might be the Speedo cluster which I changed for one similar as 191 919 035BB was not available anywhere so perhaps the sensor signal on deceleration to the change over valve does not come soon enough to extend the vacuum unit plunger in time. I did want to keep things original but you and others I have spoken to recommend changing to a Weber which is a simple device without all the complications. At least, I see, the Webers are made in Spain and not the dreaded China so will go for that. Just doing a respray so hopefully it will be back on the road shortly. Thanks for your quick reply. JohnnyMac.
