W108 1968 6 cyl auto trans wiring diagram or pic

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Hahndorfautohaus
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W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Tue 01 Sep, 2015 9:14 pm

Good evening
Is anyone able to assist with a pic or diagram of the wiring
Mine has had the wiring block unscrewed and has two wires hanging loose, I can find a wiring diagram or pic to find where they connect
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Tony From West Oz
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Tony From West Oz » Tue 01 Sep, 2015 9:27 pm

With Automatic transmissions there is a requirement that they are not able to have the engine started unless in N or P. These wires are most likely for that purpose (Neutral Safety Switch).
They are generally in series with the wire from the start position of the Ign. switch, to the starter motor.

I hope this helps,
Tony
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by CraigB » Tue 01 Sep, 2015 11:15 pm

This is discussed on here somewhere - 4 wires - 2 for the lock out and from memory if you short those it should start in any postion and with a multi meter can check the switch for being closed in p and n - other 2 for reverse light and closed in R of course to send current to those lights.
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Hahndorfautohaus
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Wed 02 Sep, 2015 9:06 am

IMG_5672.JPG
IMG_5671.JPG
IMG_5670.JPG
These are pics of the wiring as I found it on the car, as you can see there are two wires that are loose, there are also 4 screw holes that can bee seen, what I am not sure of is should these loose wires be grounded to the trans, or is there another piece missing
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by CraigB » Wed 02 Sep, 2015 11:32 am

Thats not what i was picturing, that looks just like a joiner and not a switch on the shifter. Have a look at this thread, diff car but similar set up:

viewtopic.php?f=25&t=7711&p=49012

And i'm colourblind, trying to look at your wire colours! See if anyone else recognises your set up.

Will it start and lock out in other than P and N - do reverse lights work? I don't think there should be any earths but can check when i have a chance.
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by pastelgrey300D » Wed 02 Sep, 2015 11:42 am

I think that terminal block is the connector for the solenoid that sits on top of the trans and controls the kick down and also puts the trans into neutral when the car is idling in drive. Finnies have a similar setup. I will see if I can find a wiring diagram at home tonight.

If those wires are disconnected, the car may still run and drive, you won't have any kickdown and the trans will stay in drive when stationary at idle - this is ok as long as you don't leave it for more that 5 seconds (i.e. shift into neutral) - these cars have a fluid coupling instead of a torque converter so sitting in gear with the car not moving is a no-no.

The neutral safety switch and reverse light switch could be mounted on the firewall and connected to the shifter linkage.
David
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Wed 02 Sep, 2015 12:03 pm

Greatly appreciated for your assistance

I topped the trans fluid up this morning, after I finally got the car running properly, it had 3 spark plugs that had decided to stop working, once I put new plugs in it it is now purring like a kitten :dance: just need to pull a bit more fuel out at idle.

The car is up on stands while I am getting everything sorted, I checked the trans operation and found that the the trans wouldn't shift out of first, but it did select forward and reverse gears easily, this is the last piece of the puzzle to get sorted and then all things being equal it should be ready for the Bay to Birdwood run later this month.
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by eddie » Wed 02 Sep, 2015 12:24 pm

sorry, I'm highjacking a little bit,

Further to your comment Dave about returning to neutral when in drive at idle, my car is always in gear, if I take my foot off the brake it creeps forward, should it revert to nuetral and have no forward drive???

maybe my solenoid isn't fully funtional?
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Wed 02 Sep, 2015 12:35 pm

IMG_5129.JPG
IMG_5126.JPG
All good, South Aussies unite :occasion5:

Is anyone else aim to be at BTB
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Thu 03 Sep, 2015 8:51 am

pastelgrey300D wrote:I think that terminal block is the connector for the solenoid that sits on top of the trans and controls the kick down and also puts the trans into neutral when the car is idling in drive. Finnies have a similar setup. I will see if I can find a wiring diagram at home tonight.

If those wires are disconnected, the car may still run and drive, you won't have any kickdown and the trans will stay in drive when stationary at idle - this is ok as long as you don't leave it for more that 5 seconds (i.e. shift into neutral) - these cars have a fluid coupling instead of a torque converter so sitting in gear with the car not moving is a no-no.

The neutral safety switch and reverse light switch could be mounted on the firewall and connected to the shifter linkage.
Any luck with the wiring diagram?
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by pastelgrey300D » Thu 03 Sep, 2015 10:35 am

Still looking through my stuff but I did find this on the web:

Image

Image

Both of these diagrams show that the brown/brown & black; white/brown & white and plain brown wires should all be paired together. There should be two ring terminal sets of wires at each screw terminal.

Not sure about that green and brown terminal - but I will double check that. I might just crawl under my car and try to grab a photo seeing as I know my trans works ok!
David
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1965 W110 190c - Mittelrot
1963 W110 190c - Custom Wagon Conversion (work in progress)
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by CraigB » Thu 03 Sep, 2015 11:09 am

Pastel beat me to it but you will be able to cross reference all this!

I wont be at B2B but have you entered? They usually have a cut off date and 'the classic' can be oversubscribed. One year they let the numbers run high and turned into bedlam so unless things have changed they will cap at around 1500. If all else fails, it is public roads and you can park near the start and drive with the cars.

This is a haynes wiring diagram - probably breaking some copyright laws! Hope it is clear enough. Experience has shown that the lines are usually correct but sometimes colours different.
DSCN1290.JPG
DSCN1291.JPG
DSCN1293.JPG
Could you confirm my question "Will it start and lock out in other than P and N - do reverse lights work? " Sounds like it is starting and if that stuff is working maybe just the solenoid bit is a problem.

As i thought no earths in that area apart from the kickdown solenoid itself (20). You should have current from a black/red wire to the kickdown switch (29) that when pressed with pedal sends that current to the solenoid with black/white wire. The reverse/lockout switch (30), black/yellow/red wire current into switch and then grey/yellow back to reverse lights. N/P start, wiring diagram says vi/ws with power from ignition switch (40), but doesn't define vi (shows li as violet but my guess this is a misprint) - vi to starter motor and relay for starting valve (31)

But like i say the colours can be out and i am colourblind anyway so I tend to narrow down what is what with a multimeter. Good luck!
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by scorchi0 » Thu 03 Sep, 2015 12:29 pm

CraigB wrote:shows li as violet but my guess this is a misprint
The German word for purple is lila, hence the abbreviation to li.

edit: Just opened the diagrams and realised it shows vi everywhere else :violent1:

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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Thu 03 Sep, 2015 12:57 pm

Fantastic guys :read2:

With that information I went out and checked over the wiring, the Green/Red wire joins with the other loose black wire and they get screwed onto the the back of the servo pressure switch, that then allows the box to change gears.

Tried it and it works :dance: The old girl runs and has gears....wooo hooo

Time to get the new tyres fitted tomorrow, lots of polishing and cleaning, then it is ready for Bay to Birdwood
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by pastelgrey300D » Thu 03 Sep, 2015 1:08 pm

Fantastic to hear! I was contemplating entering as I have several cars that would be eligible but am giving it a miss due to the new baby. According to the website there are still a few places left (looks like they are up to around 1650 entries out of 1750), if i recall the last classic event didn't quite fill up. Looking at the entry list there are quite a few mercs too:

http://www.baytobirdwood.com.au/uploads ... August.pdf
David
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1963 W110 190c - Custom Wagon Conversion (work in progress)
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Thu 03 Sep, 2015 2:58 pm

11953174_10153198604008613_1049191182879063082_n.jpg
Only one 68 280SE Sedan, wonder whos that could be? :laughing6:
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by CraigB » Thu 03 Sep, 2015 4:55 pm

Times change and it show you why it is important to support these things. I remember now the magic number was 1750 and one year i think it was nearly 2000 entries accepted and it just tipped the organisational scales and in years thereafter people were knocked back if over that magic number or on a wait list. But unless this has changed they don't have major sponsors that throw lots of cash around and run close to the wire to keep entry cost down. Lots of overheads on something this size whether you get 17 or 1750 entries. In the past when they had good sponsorship to cover all the costs, they generated lots for charity but in more recent times, some events, especially the vintage one where they don't get anywhere near the 1750 can run at a loss. The classic has propped the prewar event as a rule. But I think it is still the longest display event of its type in the world still, attracts interest from around australia and one day when Joe Average tends to notice how many of these funny old cars are about the place! Now if i could just convince my son to shift his birthdate and what he has requested for that day i might join you now i have reminded myself of its importance!
Craig Baulderstone
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Re: W108 1968 6 cyl auto trans wiring diagram or pic

Post by Hahndorfautohaus » Thu 03 Sep, 2015 5:46 pm

Do It !!!! :wav:
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