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sberman
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Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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 Posted: Fri Oct 24, 2014 9:38 am Post subject: Oil light 1st post |
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Hi i got a 1973 super bug all stock not bad shape running pretty good now
Problem is the oil sender by the carb has a wire on it and i cannot find where it goes any help would be appreciated
Thanks |
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Chochobeef
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Joined: May 01, 2013
Posts: 811
Location: Ft. Worth, Texas
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| Posted: Fri Oct 24, 2014 9:59 am Post subject: |
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According to the wiring diagram, it should have a blue with green stripe wire going to a single wire connector and then to the light on the speedo.
You should refer to the technical section for wiring diagrams to get an idea of what to look for. If your wiring has been hacked up, it could differ but atleast you can start the trace from both ends if necessary. |
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sberman
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Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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| Posted: Fri Oct 24, 2014 10:04 am Post subject: |
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| Has the wire on it but it is just wrapped up so im trying to find if it goes straight to light or if there is a connector somewhere |
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Danwvw
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Joined: July 31, 2012
Posts: 8892
Location: Oregon Coast
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| Posted: Fri Oct 24, 2014 11:26 am Post subject: |
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Are you talking about the fuel shut off valve on the carb? It and the choke heater element both go to the 15 wire to the coil!
The oil sending unit is down below the carb on the left side of the case!
Here is a example photo it's a 1972:
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1960 Beetle And 1679cc DP W-100 & Dual Zeniths! |
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Chochobeef
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Joined: May 01, 2013
Posts: 811
Location: Ft. Worth, Texas
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| Posted: Fri Oct 24, 2014 12:15 pm Post subject: |
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| sberman wrote: |
| Has the wire on it but it is just wrapped up so im trying to find if it goes straight to light or if there is a connector somewhere |
The picture above doesn't show the oil pressure sensor which is what I am thinking you are speaking of. If that is the case then what I said above is correct. It goes straight to the light. In the picture, the shiny goldish wire is going to the idle cutoff solenoid (left side under the distributor plug wires).
If it is not the oil pressure sensor, can you provide us with a picture of what you have? |
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[email protected]
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Joined: June 02, 2011
Posts: 1593
Location: Louisville, ky
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| Posted: Fri Oct 24, 2014 12:36 pm Post subject: |
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| A better description of the location of the oil pressure sensor is left side near the lower pulley. Saying near the carb has most of us thinking you are referring to the fuel cutoff solenoid. |
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Cusser
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Joined: October 02, 2006
Posts: 31352
Location: Hot Arizona
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| Posted: Fri Oct 24, 2014 12:47 pm Post subject: |
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| [email protected] wrote: |
| A better description of the location of the oil pressure sensor is left side near the lower pulley. Saying near the carb has most of us thinking you are referring to the fuel cutoff solenoid. |
Yep. In your photo the choke heater (passenger side of carb) and the shut-off solenoid (driver side of carb) both rewired with a yellow wire in your photo - should attach to coil positive terminal.
The only wire on coil negative terminal should be a green wire going directly to the distributor (and a tachometer wire, if you have one).
Anyway - if the oil light isn't coming on when you turn the key to "run" like before you try to start, then disconnect its termianl (down near pulley, driver side) and ground that terminal to engine metal, see if the light then turns on. If that's disconnected already: that's your issue.
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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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sberman
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Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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| Posted: Fri Oct 24, 2014 1:21 pm Post subject: |
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yes I am talking about the oil sender
the light works when the wire is grounded just need to find where it was connected to the one that is on there has a spade connector but I can find the other end to connect it to so I guess tomorrow after a oil change and valve adjust and change the plugs I will tracing out that wire right now I am checking the oil every other day just making sure only had the bug 2 weeks now being careful is better then having to rebuild a motor right now |
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windfish
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Joined: September 05, 2012
Posts: 1126
Location: NC
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| Posted: Fri Oct 24, 2014 2:12 pm Post subject: |
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The oil sender just completes the circuit's ground.
The wire that attaches to the sender goes all the way to the bulb in the speedometer, no stops. The three bottom bulbs in the speedometer get their power from the base and use a ground switch to turn on.
Here, your wiring diagram -
http://www.thesamba.com/vw/archives/info/wiringt1.php
http://www.thesamba.com/vw/archives/info/wiring/73-only113wiring.jpg
And the key -
http://www.thesamba.com/vw/archives/info/wiring/bug_73_key.jpg
Look for F1, it's above 38 (at the bottom)
It looks like it goes through one connector (T) then straight to the light.
If grounding the wire end in the engine bay makes the light come on in the speedo and the switch doesn't work, the switch is bad. Replace it with one from an aircooled supplier (needs to be a very low pressure switch (3 psi?) otherwise the light'll come on at hot idle [it still might, depending how your engine is doing]). Careful with the tapered threads. |
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sberman
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Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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| Posted: Fri Oct 24, 2014 3:58 pm Post subject: |
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im pretty sure the sender is still good
just needed the correct spot for the wire ----guess I have to do some tracing off the light back --- fun fun fun
thanks for the help |
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flyboy161
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Joined: December 26, 2009
Posts: 2091
Location: Perry, GA
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| Posted: Fri Oct 24, 2014 4:10 pm Post subject: |
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Two questions, only because you seem a little vague about things.
1. Is there a wire connected to the switch?
2. Does the light come on when you switch the ignition on?
As for the wire, there is no connector between the switch and the light. It is one solid run of wire.
We need to know what the actual problem is. A good question to the forum would be: I switch my ignition switch on and the oil light does not light up. The wire IS connected to the switch, AND I swapped the oil and generator light bulb and it works in the generator position.
Or, I can't figure out which wire connects to the oil pressure switch. I don't have a wire connected to it.
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http://www.thesamba.com/vw/forum/viewtopic.php?t=611483 |
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sberman
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Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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| Posted: Fri Oct 24, 2014 4:48 pm Post subject: |
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ok so lets try and clear this up some
just got bug 2 weeks ago both lights were on all the time
found bad fuses and replaced so now the "g" light comes on with key but no "o" light at all
investigate more and found that on the oil switch there is a wire just hanging there maybe a attempt of the po to get rid of the "o: light
so now my question is lights in the speedometer seem to fuction fine except that the oil light to not come on at all
so I needed to know where the wire coming off the switch in the engine compartment goes ?
hope this helps |
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flyboy161
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Location: Perry, GA
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sberman
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Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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| Posted: Fri Oct 24, 2014 5:31 pm Post subject: |
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yes when grounded the light does come on
that is what I am trying to find where that connector box is at I am just not seeing it yet that was the schematic I was using guess I should of started with saying that to
sorry if I got you all confused thanks for trying to help |
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flyboy161
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Joined: December 26, 2009
Posts: 2091
Location: Perry, GA
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| Posted: Fri Oct 24, 2014 5:44 pm Post subject: |
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As someone above said, the switch provides a ground for the light when the oil pressure is low. This causes the light to light up. If the wire at the switch touches metal on the motor, the light lights up. Therefore the switch is bad and needs to be replaced.
By touching the wire at the switch to ground you are turning on the light. That means the switch is no longer functioning and the wire is good. You need not test the wire anymore because you are turning on the light by touching the wire to metal.
Make sense?
_________________
My father's 1970 Beetle-
http://www.thesamba.com/vw/forum/viewtopic.php?t=603879
The 1964...Diamond in the rough
http://www.thesamba.com/vw/forum/viewtopic.php?t=612776
My 1958 Morocco Bug-
http://www.thesamba.com/vw/forum/viewtopic.php?t=611483 |
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sberman
Samba Member
Joined: October 15, 2014
Posts: 23
Location: thousand oaks ,ca.
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| Posted: Fri Oct 24, 2014 6:24 pm Post subject: |
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yes I understand what you are saying
now the one part that I don't see is that the wire going to the switch
the wire that is on the switch is just hanging there not even going to the switch yet that is where my problem is
is that more clear
so what I am saying I have no light because the switch is not even hooked up to the light that is what I am trying to correct
what I am going to try to do is make a jumper long enough to go from the switch to the light and test it then I can trace it out from them make sense |
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Danwvw
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Posts: 8892
Location: Oregon Coast
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| Posted: Fri Oct 24, 2014 6:37 pm Post subject: |
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Well if the wire just hanging there turns on the oil light when you ground it then it's the wire for the oil sending unit. If not it's probably something else. I think but am not sure you can find that blue green oil light wire under the back seat near the voltage regulator in the wiring bundle. One is blue it's the Gen/Alt light wire the other is blue green it's the oil light but sometimes the colors have faded and it's hard to see the difference. Looks like the oil light circuit is labeled K3 at the light and F1 at the sender.
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Last edited by Danwvw on Fri Oct 24, 2014 6:47 pm; edited 1 time in total |
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flyboy161
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Location: Perry, GA
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cletus_zuber
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Joined: January 08, 2010
Posts: 2406
Location: Gladstone, Ore
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| Posted: Fri Oct 24, 2014 6:56 pm Post subject: |
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| flyboy161 wrote: |
| If the wire is not plugged into the switch, then plug it in! |
And post a picture of this mess, its confusing as hell.
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ashman40
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Joined: February 16, 2007
Posts: 15982
Location: North Florida, USA
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| Posted: Fri Oct 24, 2014 7:44 pm Post subject: |
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Is the wire at the Oil light in the speedo the stock blue/green wire?
Is the wire at the oil pressure switch the stock blue/green wire?
If you momentarily ground the oil switch wire (whatever the color is) while the ignition switch is ON, does the Oil light in the speedo come ON? If you are worried, you can use a test light wired between the wire and ground. This will avoid blowing any fuses or melting wires. Both the test lamp and the Oil light should turn ON.
If all the above tests indicate the wire at the oil pressure switch is the one connected to the Oil pressure indicator light in the dash... just add a female push on terminal and connect it to the Oil pressure switch.
Test the switch:
With the engine OFF, the terminal on the oil pressure switch should be shorted to ground.
With the engine running above idle (~1500rpm) the switch terminal should be OPEN and there is no path to ground through the switch.
You can test the above with an ohm meter or test lamp.
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AshMan40
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'67 Beetle #1 {project car that never made it to the road  }
'75 Beetle 1200LS (RHD Japan model) {junked due to frame rot}
'67 Beetle #2 {2019 project car - Wish me luck!} |
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