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Post by 1800heap on Dec 22, 2018 0:26:18 GMT
Anyone know where I can find the wiring diagram for a MK3 crab?
Thanks
Nick
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Post by Penguin45 on Dec 22, 2018 1:20:02 GMT
I've got it in the back of the "office" WM (The one that doesn't get dragged around the garage). AKD4138 Issuue 1. I'll see if I can get a decent scan or pic over the next day or so.
Chris.
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Post by dave1800 on Dec 22, 2018 3:47:17 GMT
I've got one on my system from AKD4138 12th edition 1977 that I will sent to Nick. It's the version with the alternator (I also have the MK111 with dynamo if anyone needs it) David I've got it in the back of the "office" WM (The one that doesn't get dragged around the garage). AKD4138 Issuue 1. I'll see if I can get a decent scan or pic over the next day or so. Chris. |
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Post by 1800heap on Dec 22, 2018 4:38:57 GMT
I've got one on my system from AKD4138 12th edition 1977 that I will sent to Nick. It's the version with the alternator (I also have the MK111 with dynamo if anyone needs it) David I've got it in the back of the "office" WM (The one that doesn't get dragged around the garage). AKD4138 Issuue 1. I'll see if I can get a decent scan or pic over the next day or so. Chris. Thank you very much guys. My dad is having some issues with my car and I only have a MK2 diagram. Some of his labels have fallen off while he had the engine out! He cant get an ignition light or starter so I think he must have a wire in the wrong spot! It must be one of the feeds from the starter I think. He also has a couple of wires he is not sure where they are from. The lights work which is something! He metered 16 volts at the battery, engine off and no charger connected, which I can only think must be his cheap meter! Nick |
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Post by 1800heap on Dec 22, 2018 4:54:23 GMT
Chris
If your diagram has the pre-engauged starter on it as well as an alternator, could I have a copy of yours too when you get a chance please.
David your diagram helps thanks very much for that.
Im wondering why my car has 5 fuses in the box not 3. Im sure they usually have 3 dont they? Perhaps I modified it and dont remember!
Nick
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Post by 1800heap on Dec 22, 2018 5:58:35 GMT
Don't worry Chris I think David's diagram is as close as it gets. It looks like a seperate starter solenoid but covers both I think. There are two spade connectors on my starter! One is for the solenoid but not sure what the other is. The diagram dosent show any other wires so perhaps it is a no connect!
Thanks
Nick
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Post by dave1800 on Dec 22, 2018 7:07:09 GMT
I am now sending you details of the 2 different pre-engaged starters, M35J and 2M100, the latter has 2 spade terminals, both of which are used. Also a diagram from a W18/85S (ie Mk11) that shows the wiring for AN inertia pre-engaged starter at items 4 and 5 , helpfully doesn't say which type. More BL quality control over documentation. Not sure if there were any more w/s manuals after mine dated 1977 - even if there were it is unlikely they were corrected, but I stand to be amazed.
The connectors take power to fuse A1 and the other non switched components from what I can make out given no diagram actually represents what was fitted! If this is the case then it looks as though there is a feed not connected. It looks as though the feed from the ignition switch that actuates the solenoid is the one that is missing, it is quite a thin wire with a standard size lucar connector I recall. If he finds a spare wire can check for 12v (or 16v!)on the terminal only when the ignition switch is turned to the start position.
I wish him good luck!
David
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Post by 1800heap on Dec 22, 2018 23:21:08 GMT
Dad has asked me where the engine earth strap goes. I cant remember and cant find anything helpful in the manuals. This will not help the electrical issues we have either!
I have worked out why there are 5 fuses in the fuse box! 2 are spares Doh!!!🤣😁
There is also a bracket that is left over! I think it is for the loom but its a mystery where it goes. I will try and get a photo.
Nick
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Post by Penguin45 on Dec 23, 2018 1:31:51 GMT
The earth strap on my cars is mounted under the top starter motor motor bolt and runs directly to the battery earthing point on the left (from the front) inner wing. That connection needs stripping and cleaning regularly. I usually slather it with petroleum jelly to try and keep it from oxidising too quickly.
Chris.
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Post by 1800heap on Dec 23, 2018 3:20:02 GMT
The earth strap on my cars is mounted under the top starter motor motor bolt and runs directly to the battery earthing point on the left (from the front) inner wing. That connection needs stripping and cleaning regularly. I usually slather it with petroleum jelly to try and keep it from oxidising too quickly. Chris. That sounds like the best place for it. I think the strap dad has is quite short though so would not reach. I seem to recall it attaching to the bell housing somewhere but I might be confusing the Oz car. Im fairly certain he didnt remove the battery earth point! I suppose anywhere it reaches would do! Thanks Chris |
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Post by dave1800 on Dec 23, 2018 5:53:32 GMT
As you say the best place for the earth strap is the starter bolt to ensure maximum electrical power is available for starting and reliability. I think your dad should be able to find the location on the inner wing on the same side as the battery for the one end by looking for the tapped hole, probably with some corrosion around it. He can then see how far the strap will reach allowing for some slack for engine movement. I think you are right it was bolted to the bell housing but my memory isn't that good either. Of course it goes without saying that the locations for both ends need to be thoroughly cleaned and covered in petroleum jelly or similar to prevent oxidation as Chris noted.
Can anyone confirm please?
David
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Post by Penguin45 on Dec 23, 2018 17:16:43 GMT
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Post by 1800heap on Dec 24, 2018 5:52:48 GMT
Thanks Chris and David.
I got dad to put the strap where you suggested Chris and bingo ignition light and starter now work. The second diagram 1972 on is the one for sure.
He had the starter wiring correct as per the M35J diagram so that was good. We traced one of the unknown wires as the oil pressure switch wire. There is no sender as it has a gauge. I have ebayed a mini one to him and will get him to put it on as I think the light is more noticable than just the gauge.
It turned over and the oil pressure eventually went up to 50 psi after a bit of cranking with the plugs out. The carbs and exhaust manifold still have to be put back on but almost ready for a start up!
Couldnt get the brake lights to work or the horns and the wipers need help at the moment so bit more to do.
Can you remind me what the 4 dash lights are? Oil pressure, ignition and main beam but what is the last one? I dont think my car has a filter blockage light.
Nick
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Post by dave1800 on Dec 24, 2018 8:30:25 GMT
Good news! It sounds as though there may be an issue with the fuse at A4 on the diagram. Maybe just corroded or the caps come loose? I seem to recall the yellow /amber blocked filter light was left in place despite no longer being sensed.
David
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