VW Diagnostic Socket Wires

STP · Posted: Thu Apr 22, 2010 9:32 pm Post subject: VW Diagnostic Socket Wires

Do any of the wires from that diagnostic socket in the engine compartment go to the front of the Bus?

Mine is a '72

If so which ones? There's like nothing on the wiring diagram about where those wires go.

maximan1 · Posted: Thu Apr 22, 2010 9:33 pm Post subject:

The 3 prong plug going from the back of the case? Doesn't go anywhere, obsolete VW diagnostic plug.
_________________
1978 Transporter, 2.0L FI

STP · Posted: Thu Apr 22, 2010 9:37 pm Post subject:

No not that one. The 20 or so pin diagnostic socket above the battery.

I'll try to find a pic.

maximan1 · Posted: Thu Apr 22, 2010 9:40 pm Post subject:

Sounds like an FI computer plug.

Image may have been reduced in size. Click image to view fullscreen.

Is it that one?
_________________
1978 Transporter, 2.0L FI

STP · Posted: Thu Apr 22, 2010 9:41 pm Post subject:

Haha no it's not that either. Mine is a '72 so no FI.

http://www.netlink.net/mp/volks/htm/plug.htm

I couldn't find a good pic of where it goes. But this is it.

SGKent · Posted: Thu Apr 22, 2010 9:44 pm Post subject:

goes to different places. It allowed them to test light bulbs, battery cells - all sorts of things quickly. Funny thing is we took our 1971 Deluxe to a big local So Cal dealer (EconoMotors in Riverside who was the original EMPI) in 1976 and asked them to test it - even then they had trouble finding the harnesses and someone who could run their computer. The whole thing was a joke even then - but I wouldn't remove it unless it bothers you because some day some buyer will say - Oh, I'd pay you more but the thingy is missing...
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Canned Water - the new California approved parts cleaner (except in a drought in which case rub it with sand). Rolling Eyes

George Carlin:
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Skills@EuroCarsPlus:
"never time to do it right but always time to do it twice" Rolling Eyes

maximan1 · Posted: Thu Apr 22, 2010 9:44 pm Post subject:

Hmmm, I did not notice that my bus had any sort of diagnostic plug. If it's supposed to be activated by VW specialists at the dealer, it wouldn't plug into anything. The way the web page describes it makes me think that it doesn't plug into anything but a computer at the dealership.
_________________
1978 Transporter, 2.0L FI

STP · Posted: Thu Apr 22, 2010 9:48 pm Post subject:

I was thinking I could run a signal wire for my oil temp and pressure senders if the wires go to the front of the bus. I've heard from people in the past using those wires for instrumentation but maybe it was just on Beetles.

SGKent · Posted: Thu Apr 22, 2010 9:50 pm Post subject:

rcrjacob · Posted: Thu Apr 22, 2010 9:55 pm Post subject:

There is one wire that does. It's the diagnostic wire for the rear window defroster. It connects to the switch and not the defroster on the glass. I believe it's a blue wire with a white stripe (but don't quote me on it.) I plan on using mine for a tach lead, although I have a ton of extra wires to run. It goes to terminal 5 on the diagnostic plug. Check your bentley diagram and use a multimeter to confirm the wire.

STP · Posted: Thu Apr 22, 2010 9:56 pm Post subject:

Awesome! I'll check it out.

Thanks for your help.

busdaddy · Posted: Thu Apr 22, 2010 10:29 pm Post subject:

Yes there are a few wires that go all the way to the front, look at the diagram for the circuits with a short branch coming off that ends in a orange dot with a number in it.
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rcrjacob · Posted: Thu Apr 22, 2010 11:16 pm Post subject:

Just checked the bentley for the 72 model. Looks like there are no extras running to the front.

STP · Posted: Thu Apr 22, 2010 11:18 pm Post subject:

Yeah I was looking at that too. I don't see any orange numbers on that part of the car.

Lil Lulu · Posted: Fri Apr 23, 2010 6:35 am Post subject:

There is a brown wire with white that comes from the harness that has the blue oil pressure wire and the wire to the coil. I'm going to use it for oil temp.

RB
_________________
'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

busdaddy · Posted: Fri Apr 23, 2010 7:21 am Post subject:

Lil Lulu · Posted: Fri Apr 23, 2010 1:46 pm Post subject:

Right busdad I did the booster fan delete.
_________________
'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

busdaddy · Posted: Fri Apr 23, 2010 2:06 pm Post subject:

I just looked at a 73 and there's 2 wires to the front, blue/white and grey, the harness was hacked at the fusebox so I couldn't see where they went further forward from there.
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rcrjacob · Posted: Fri Apr 23, 2010 2:26 pm Post subject:

72 harness is different than 73. It doesn't have as many diagnostic wires.

busdaddy · Posted: Fri Apr 23, 2010 4:41 pm Post subject:

Just looked at a 6/72 and it's got them.
_________________
Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!

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