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beetlenut
Samba Member
Joined: May 27, 2009
Posts: 2983
Location: RI
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 Posted: Thu Jul 26, 2018 7:30 am Post subject: Oil Pressure switch |
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Sorting through my engine bay wiring in preparation for my engine going back in, I can't seem to find the oil pressure switch wire. Does that wire come out of the bunch of wires that come out of the left side of the upper engine bay, or does it come off the coil (+) with the fuel cut-off and automatic choke wires? I can't figure out what happened to it? A picture of it going from the oil pressure switch to where ever it goes would be helpful.
Thanks
_________________
scrapyards are for quitters
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| Wetstuff wrote: |
| ... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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joey1320
Samba Member
Joined: September 12, 2006
Posts: 2325
Location: Cleveland, OH
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sjbartnik
Samba Member
Joined: September 01, 2011
Posts: 5998
Location: Brooklyn
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| Posted: Thu Jul 26, 2018 8:15 am Post subject: Re: Oil Pressure switch |
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It does NOT come off the coil + terminal, do NOT do that. You will create a direct short to ground with the ignition on which will smoke the un-fused coil power wire all the way back to the ignition switch.
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1965 Volkswagen 1500 Variant S
2000 Kawasaki W650 |
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beetlenut
Samba Member
Joined: May 27, 2009
Posts: 2983
Location: RI
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| Posted: Thu Jul 26, 2018 8:15 am Post subject: Re: Oil Pressure switch |
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Yes, yes, I already have a print out of the wiring diagram which I have used with good success to label and sort out the wires in the engine bay. I'm saying I can't physically find that wire either coming out of the harness, or off the coil.
I did find another set of wires, with connectors on each end, that looks exactly like the one that comes off the right side tail light connector that's used to supply power to the license plate. Is there one of those used on the left side for something, or do I just have a duplicate?
_________________
scrapyards are for quitters
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| Wetstuff wrote: |
| ... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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busman78
Samba Member
Joined: August 17, 2004
Posts: 4524
Location: Oklahoma City, OK
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| Posted: Thu Jul 26, 2018 9:24 am Post subject: Re: Oil Pressure switch |
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Originally it came from the upper left, it was in the same plastic sheath as the coil wire bundle, when that bundle got close to the the coil the oil pressure switch wire spliced off, it would of been in a smaller plastic sheath.
Anything on the right is for lights. |
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beetlenut
Samba Member
Joined: May 27, 2009
Posts: 2983
Location: RI
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| Posted: Thu Jul 26, 2018 10:13 am Post subject: Re: Oil Pressure switch |
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| busman78 wrote: |
Originally it came from the upper left, it was in the same plastic sheath as the coil wire bundle, when that bundle got close to the the coil the oil pressure switch wire spliced off, it would of been in a smaller plastic sheath.
Anything on the right is for lights. |
OK, I know the smaller bundle you're talking about that splits off of the Alternator wires. I suppose it's possible the electro cut-off/automatic choke wires, which are spliced into one push-on connector, might have gotten plugged into the end of the oil pressure wire over the years during the rebuild. I was trying to determine if the oil pressure switch wire was one of the pins in the test socket, so I could do a continuity test on the wires to find it that way. More leads to try out when I get home anyway.
_________________
scrapyards are for quitters
---------------------------------------
| Wetstuff wrote: |
| ... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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Randy in Maine
Samba Member
Joined: August 03, 2003
Posts: 34890
Location: The Beach
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| Posted: Thu Jul 26, 2018 10:14 am Post subject: Re: Oil Pressure switch |
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| I think it is a blue wire. |
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joey1320
Samba Member
Joined: September 12, 2006
Posts: 2325
Location: Cleveland, OH
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busman78
Samba Member
Joined: August 17, 2004
Posts: 4524
Location: Oklahoma City, OK
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| Posted: Thu Jul 26, 2018 10:48 am Post subject: Re: Oil Pressure switch |
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First picture is about the best I have of original, you can see the blue wire make the exit from harness right before the coil, about the same time as the coil wires.
Next set is the compartment now, you can still see the blue wire exit the bundle heading to the oil pressure switch.
I have eliminated the test plug, capped and bundles the wires out of the way.
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beetlenut
Samba Member
Joined: May 27, 2009
Posts: 2983
Location: RI
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| Posted: Thu Jul 26, 2018 11:17 am Post subject: Re: Oil Pressure switch |
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| busman78 wrote: |
First picture is about the best I have of original, you can see the blue wire make the exit from harness right before the coil, about the same time as the coil wires.
Next set is the compartment now, you can still see the blue wire exit the bundle heading to the oil pressure switch.
I have eliminated the test plug, capped and bundles the wires out of the way.
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Thanks Busman, I'll start cleaning all the years of grime off the wires and look for that blue wire when I get home. I'm betting I plugged the cut-off/auto choke wire combo into the oil pressure wire so I wouldn't loose them when I pulled the engine out years ago. As a side note, I went to college in Norman!
_________________
scrapyards are for quitters
---------------------------------------
| Wetstuff wrote: |
| ... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31379
Location: Hot Arizona
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| Posted: Thu Jul 26, 2018 2:14 pm Post subject: Re: Oil Pressure switch |
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| busman78 wrote: |
Originally it came from the upper left, it was in the same plastic sheath as the coil wire bundle, when that bundle got close to the the coil the oil pressure switch wire spliced off, it would of been in a smaller plastic sheath.
Anything on the right is for lights. |
This.
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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beetlenut
Samba Member
Joined: May 27, 2009
Posts: 2983
Location: RI
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| Posted: Thu Jul 26, 2018 3:35 pm Post subject: Re: Oil Pressure switch |
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OK, got it sorted. It's what I thought. I plugged the cut-off/auto choke wire combo into the oil pressure wire so I wouldn't loose them when I took the engine out. What, that was only 18 years ago!  After a good cleaning, it did turn out to be a faded dark green wire. Engine wiring is now ready to go. Thanks for the helpful responses.
_________________
scrapyards are for quitters
---------------------------------------
| Wetstuff wrote: |
| ... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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Buzzerbug74
Samba Member
Joined: June 04, 2018
Posts: 29
Location: Delaware
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| Posted: Thu Jul 26, 2018 10:21 pm Post subject: Re: Oil Pressure switch |
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I'm having the same issue locating the oil pressure hookup as well and my engine is still in!
Been like this since I got it recently.
Only wire straight off harness is the stripped end one? Not sure if I just need to add a female end and connect to it? |
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VW_Jimbo 
Samba Member
Joined: May 22, 2016
Posts: 9967
Location: Huntington Beach, CA
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| Posted: Thu Jul 26, 2018 11:05 pm Post subject: Re: Oil Pressure switch |
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| Buzzerbug74 wrote: |
I'm having the same issue locating the oil pressure hookup as well and my engine is still in!
Been like this since I got it recently.
Only wire straight off harness is the stripped end one? Not sure if I just need to add a female end and connect to it? |
That’s it. The wire has lived a long, hot life and is showing its age, going gray! If you ground it with the key on, the oil pressure warning light will illuminate. If I am wrong, you will pop a fuse!
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Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
| TDCTDI wrote: |
| Basically, a whole bunch of fuckery to achieve a look. |
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GFY's Xevin and VW_Jimbo!  |
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airschooled
Air-Schooled
Joined: April 04, 2012
Posts: 12728
Location: on a bike ride somewhere
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| Posted: Thu Jul 26, 2018 11:13 pm Post subject: Re: Oil Pressure switch |
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Buzzerbug74, the green and red wire coming out of that sheath is your oil pressure warning light wire, as shown on K3, current track 37 above. The green and white is Coil (-) to diagnostic plug, and can remain safely clipped.
Here is the key to the wiring diagram posted above.
Here is how to read the late style wiring diagrams:
Good luck!
Robbie
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One-on-one tech help for your Volkswagen:
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Buzzerbug74
Samba Member
Joined: June 04, 2018
Posts: 29
Location: Delaware
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| Posted: Fri Jul 27, 2018 4:28 am Post subject: Re: Oil Pressure switch |
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| asiab3 wrote: |
Buzzerbug74, the green and red wire coming out of that sheath is your oil pressure warning light wire, as shown on K3, current track 37 above. The green and white is Coil (-) to diagnostic plug, and can remain safely clipped.
Here is the key to the wiring diagram posted above.
Good luck!
Robbie |
Thanks! It's a '74 super, I'll definitely do the swap and see how things go from there  |
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beetlenut
Samba Member
Joined: May 27, 2009
Posts: 2983
Location: RI
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| Posted: Fri Jul 27, 2018 5:50 am Post subject: Re: Oil Pressure switch |
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| Buzzerbug74 wrote: |
| asiab3 wrote: |
Buzzerbug74, the green and red wire coming out of that sheath is your oil pressure warning light wire, as shown on K3, current track 37 above. The green and white is Coil (-) to diagnostic plug, and can remain safely clipped.
Here is the key to the wiring diagram posted above.
Good luck!
Robbie |
Thanks! It's a '74 super, I'll definitely do the swap and see how things go from there |
Mine was also a 74 super and turned out to be a badly faded dark green wire. I couldn't make out the red markings on the wire, but I'm sure they're on there.
_________________
scrapyards are for quitters
---------------------------------------
| Wetstuff wrote: |
| ... I spend more time shaking it than directing it?! I get a pretty decent blast for 8sec. then have to shake it again. |
- Words to live by right there!
My 74 Super rebuild thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=6507104#6507104 |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31379
Location: Hot Arizona
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| Posted: Fri Jul 27, 2018 7:22 am Post subject: Re: Oil Pressure switch |
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During my 1970's resurrection 1.5 years ago, I found my oil sender wire was harder than a teenager at his first Ann-Margret movie in the 1960s !!!
I soldered a new wire extension on, used heat shrink tubing; better than a crimp-type butt connector.
_________________
1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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