 OT: VW Bus Fuel Gauge, Detailed Pictures added.... |
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| jim_hoyland |
 Apr 13 2010, 08:19 AM
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#1
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Get that VIN ?  Group: Members Posts: 9,277 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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My neighbor just bought an '65 VW bus. The fuel gauge needle jumps around. Anyone out there with a bus that can tell me where the weak link is ; or better, point me to a wiring diagram with troubleshooting info.
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| Tom_T |
Apr 13 2010, 10:50 AM
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#2
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TMI.... Group: Members Posts: 8,318 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California
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QUOTE(jim_hoyland @ Apr 13 2010, 07:19 AM)  My neighbor just bought an '65 VW bus. The fuel gauge needle jumps around. Anyone out there with a bus that can tell me where the weak link is ; or better, point me to a wiring diagram with troubleshooting info. Jim - Try looking on the GoWesty & BusDepot.com websites. If that fails, have him/you call Hans Imports in HB & ask for Carl or Hans (say Tom Trischler referred if needed). My guess is wiring, connections or sender - that's an old harness & probably cracked all over by now! (IMG:style_emoticons/default/dry.gif) |
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| Cap'n Krusty |
Apr 13 2010, 11:02 AM
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#3
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Sender, gauge, wires. One hot to the gauge, one ground, one sender wire. At the sender, one ground, one sender wire. It's scary simple. First check the grounds, then the power connections on both ends of the wire, then the sender wire connections. The tank "may" be difficult to access, and the sender is installed in the top of the tank. If it's like a later bus, you have to pull the engine to get to it. My neighbor is all over splitties, and I can ask him for any information you may need. I may also have an aftermarket manual for it (a repro of the real thing).
The Cap'n |
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| djporsche |
Apr 13 2010, 11:22 AM
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#4
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Texas Teener Group: Members Posts: 65 Joined: 6-August 05 From: San Antonio Texas U.S.A. Member No.: 4,548 Region Association: None |
I have had a lot of VW and every time the gauge starts to jump its the ground.
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| jim_hoyland |
Apr 13 2010, 01:10 PM
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#5
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Get that VIN ? Group: Members Posts: 9,277 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Went back over and took a few pics:
1. Wires: One black with switched 12v One brown, it shows continuity to an unused wire in engine compartment One gray with red stripe, no idea what this is yet or what it connets to 2. Sender:Behind the fan housing and held down with 4 bolts. Couldn't feel any spades for wire to attach to 3. Back of gauge: Does the terminal maked "G" get the wire returning from the sender ? Didn't find any info at Bus Depot.. Attached image(s)    
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| SirAndy |
Apr 13 2010, 01:21 PM
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#6
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Resident German Group: Admin Posts: 41,625 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
That ground terminal looks pretty rusty!
+ -> Upper left = 12 V G -> Upper right = Sending Unit Round stud -> Bottom center = Ground Clean it all up and make sure that ground is connected to a good chassis ground ... (IMG:style_emoticons/default/shades.gif) Andy Attached image(s) 
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| jim_hoyland |
Apr 13 2010, 01:22 PM
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#7
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Get that VIN ? Group: Members Posts: 9,277 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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...found this sender on-line. Top looks like one in van, but I cant's see the connector here ?
Attached image(s) 
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| Bleyseng |
Apr 13 2010, 01:52 PM
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#8
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
There is a single spade connector just like the 914 ones, different ohms thou.
For bus wiring diagrams go on thesamba.com and look in the technical section for the right one... |
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| SirAndy |
Apr 13 2010, 01:54 PM
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#9
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Resident German Group: Admin Posts: 41,625 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(SirAndy @ Apr 13 2010, 12:21 PM) That ground terminal looks pretty rusty! + -> Upper left = 12 V G -> Upper right = Sending Unit Round stud -> Bottom center = Ground Clean it all up and make sure that ground is connected to a good chassis ground ... (IMG:style_emoticons/default/shades.gif) Andy Damn it Jim! (IMG:style_emoticons/default/biggrin.gif) Just realized that the bus is 6V, not 12 V ... (IMG:style_emoticons/default/rolleyes.gif) Andy |
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| jim_hoyland |
Apr 13 2010, 02:23 PM
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#10
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Get that VIN ? Group: Members Posts: 9,277 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Was 6v, now 12 volt; lots of PO changes. (IMG:style_emoticons/default/smile.gif)
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| SirAndy |
Apr 13 2010, 02:41 PM
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#11
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Resident German Group: Admin Posts: 41,625 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(jim_hoyland @ Apr 13 2010, 01:23 PM) Did he change the fuel gauge too? It's got 6V stamped on the housing ... (IMG:style_emoticons/default/shades.gif) Andy |
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| realred914 |
Apr 13 2010, 02:48 PM
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#12
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Senior Member Group: Retired Members Posts: 1,086 Joined: 1-April 10 From: california Member No.: 11,541 Region Association: None |
QUOTE(jim_hoyland @ Apr 13 2010, 12:10 PM) Went back over and took a few pics: 1. Wires: One black with switched 12v One brown, it shows continuity to an unused wire in engine compartment One gray with red stripe, no idea what this is yet or what it connets to 2. Sender:Behind the fan housing and held down with 4 bolts. Couldn't feel any spades for wire to attach to 3. Back of gauge: Does the terminal maked "G" get the wire returning from the sender ? Didn't find any info at Bus Depot.. more bus photos please. this is getting me interested in getting my long stalled bus project going again!!! cool ride!!! |
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| jim_hoyland |
Apr 13 2010, 02:53 PM
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#13
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Get that VIN ? Group: Members Posts: 9,277 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(SirAndy @ Apr 13 2010, 01:41 PM) QUOTE(jim_hoyland @ Apr 13 2010, 01:23 PM) Did he change the fuel gauge too? It's got 6V stamped on the housing ... (IMG:style_emoticons/default/shades.gif) Andy FG will get changed; I'm trying to test and sort the wiring to get his project on track. Thanks for the help, I'm pretty set. (IMG:style_emoticons/default/smile.gif) I'l see if I can get some interior shots later. This thing cost over 9K (IMG:style_emoticons/default/dry.gif) |
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| Mike Bellis |
Apr 13 2010, 03:43 PM
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#14
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Take the sender out and check it with an ohm meter. The resistance should change linear and not jump around. Sometimes can be cleaned and repaired.
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| Mark Henry |
Apr 13 2010, 04:13 PM
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#15
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Attached image(s) 
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| zambezi |
Apr 13 2010, 09:47 PM
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#16
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Senior Member Group: Members Posts: 711 Joined: 14-April 08 From: Lafayette, LA Member No.: 8,920 Region Association: South East States |
QUOTE(jim_hoyland @ Apr 13 2010, 02:10 PM) Went back over and took a few pics: 1. Wires: One black with switched 12v One brown, it shows continuity to an unused wire in engine compartment One gray with red stripe, no idea what this is yet or what it connets to 2. Sender:Behind the fan housing and held down with 4 bolts. Couldn't feel any spades for wire to attach to 3. Back of gauge: Does the terminal maked "G" get the wire returning from the sender ? Didn't find any info at Bus Depot.. Black is your power wire -- goes to the + on the gauge. Brown is the sending unit wire -- goes to the G on the gauge Grey w/ red is the illumination wire -- goes on a bulb socket into the gauge. If he buys a voltage drop resister he can put it in between the power wire and the + on the gauge and still use the 6 volt gauge. |
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| SirAndy |
Apr 14 2010, 12:35 AM
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#17
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Resident German Group: Admin Posts: 41,625 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(zambezi @ Apr 13 2010, 08:47 PM) Brown is the sending unit wire -- goes to the G on the gauge I'm pretty sure brown is always ground ... (IMG:style_emoticons/default/shades.gif) Andy |
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| Bleyseng |
Apr 14 2010, 02:35 AM
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#18
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Brown is the sending unit wire, black is power, grey/red is the lite....
http://www.thesamba.com/vw/archives/info/w.../bus_66_USA.jpg |
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| Mark Henry |
Apr 14 2010, 04:23 AM
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#19
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Cool, that saves me from looking for it!
Jim, in answer to your PM, that diagram is what I built my bus with, so I doubt I could add much more. Let me know. |
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