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Fuel gauge stopped working
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wagohn
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Joined: June 24, 2014
Posts: 290
Location: United States
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PostPosted: Wed Apr 08, 2020 1:16 pm    Post subject: Fuel gauge stopped working Reply with quote

Hello,
Recent owners of a 76. We've only had the bus a couple of days and haven't driven it on public road yet until we get insurance. However, the gas gauge was working but suddenly isn't. Fuse is good.
We had to jump start a couple of times but are now in a good battery.
Everything else seems good.
Any ideas?
Thanks
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SGKent Premium Member
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Joined: October 30, 2007
Posts: 33064
Location: NorCal
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PostPosted: Wed Apr 08, 2020 1:54 pm    Post subject: Re: Fuel gauge stopped working Reply with quote

common intermittent problem. Often the gauge unless someone was working with the wiring etc..
_________________
'In fact, Wray said that most Americans have already been affected. “If you’re an American adult, it is more likely than not that China has stolen your personal data,” he said.' News article 7/7/2020

I am not telling you what to, or what not to do. When a suggestion is offered, it is wishing you the best, & is based on my experiences as a mechanic, automotive machinist, & from racing in the era your bus came to life.


Last edited by SGKent on Wed Apr 08, 2020 1:55 pm; edited 1 time in total
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secretsubmariner
Champagne Wrangler


Joined: January 08, 2011
Posts: 3026
Location: Tulsa, OK
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PostPosted: Wed Apr 08, 2020 1:55 pm    Post subject: Re: Fuel gauge stopped working Reply with quote

Welcome,

It would be a great idea to familiarize yourself with the search function on the forum, and probably read the FAQ at the top of the page. You might get eaten alive asking a question that's been asked and answered a billion times.

There are electrical connections on the sending unit itself. The sending unit is in your gas tank. A lot of people have holes cut in the luggage area of their buses to access the top of the gas tank. Check- do you have one of these lovely gifts from a PO? Start by cleaning the connections, power and ground. You may need to replace the sending unit. Buyer beware - most aftermarket senders S.U.C.K. Even replacing it may not fully solve your issue.

Then you have the gauge itself and all of the things that could go wrong with it. How are the electrical connections on the back of the gauge? Have you had the instrument cluster off to check? Make sure you unplug your battery before you go diving behind the dash - there are live wires here! It gets pretty complicated on the back of gauge, beware!

I just replaced the sender in my tank and cleaned all the electrical connections I could find- which made my gauge go from not working at all to reading about 70% full when it's actually full. I decided I can live with that.
Good luck!
_________________
-Tony
1978 Champagne Edition Bus FI
1970 Auto Fastback FI
[email protected] wrote:
his bus was so quiet, you could hear the meat clown laughing in the cooler

Brian wrote:
I hate all of you, I'm locking this thread.
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secretsubmariner
Champagne Wrangler


Joined: January 08, 2011
Posts: 3026
Location: Tulsa, OK
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PostPosted: Wed Apr 08, 2020 1:57 pm    Post subject: Re: Fuel gauge stopped working Reply with quote

SGKent wrote:
common


mos def?

wagohn,
Do you have a bentley? The official workshop manual for fixing these cars? It's a bigass green book. Older versions have color wiring diagrams, newer versions do not. If you have questions just pop a GOOG "bentley 1968-1979 vw bus"
_________________
-Tony
1978 Champagne Edition Bus FI
1970 Auto Fastback FI
[email protected] wrote:
his bus was so quiet, you could hear the meat clown laughing in the cooler

Brian wrote:
I hate all of you, I'm locking this thread.
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SGKent Premium Member
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Joined: October 30, 2007
Posts: 33064
Location: NorCal
SGKent is offline 

PostPosted: Wed Apr 08, 2020 1:57 pm    Post subject: Re: Fuel gauge stopped working Reply with quote

secretsubmariner wrote:
Welcome,

It would be a great idea to familiarize yourself with the search function on the forum, and probably read the FAQ at the top of the page. You might get eaten alive asking a question that's been asked and answered a billion times.

There are electrical connections on the sending unit itself. The sending unit is in your gas tank. A lot of people have holes cut in the luggage area of their buses to access the top of the gas tank. Check- do you have one of these lovely gifts from a PO? Start by cleaning the connections, power and ground. You may need to replace the sending unit. Buyer beware - most aftermarket senders S.U.C.K. Even replacing it may not fully solve your issue.

Then you have the gauge itself and all of the things that could go wrong with it. How are the electrical connections on the back of the gauge? Have you had the instrument cluster off to check? Make sure you unplug your battery before you go diving behind the dash - there are live wires here! It gets pretty complicated on the back of gauge, beware!

I just replaced the sender in my tank and cleaned all the electrical connections I could find- which made my gauge go from not working at all to reading about 70% full when it's actually full. I decided I can live with that.
Good luck!


sender has been replaced and not adjusted so it sends the right signal when full. Another common issue.
_________________
'In fact, Wray said that most Americans have already been affected. “If you’re an American adult, it is more likely than not that China has stolen your personal data,” he said.' News article 7/7/2020

I am not telling you what to, or what not to do. When a suggestion is offered, it is wishing you the best, & is based on my experiences as a mechanic, automotive machinist, & from racing in the era your bus came to life.
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secretsubmariner
Champagne Wrangler


Joined: January 08, 2011
Posts: 3026
Location: Tulsa, OK
secretsubmariner is offline 

PostPosted: Wed Apr 08, 2020 2:01 pm    Post subject: Re: Fuel gauge stopped working Reply with quote

Quote:
I decided I can live with that.

_________________
-Tony
1978 Champagne Edition Bus FI
1970 Auto Fastback FI
[email protected] wrote:
his bus was so quiet, you could hear the meat clown laughing in the cooler

Brian wrote:
I hate all of you, I'm locking this thread.
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wagohn
Samba Member


Joined: June 24, 2014
Posts: 290
Location: United States
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PostPosted: Thu Apr 09, 2020 6:39 am    Post subject: Re: Fuel gauge stopped working Reply with quote

Thanks, all. I tried the tapping on the glass trick, and replaced the fuse again - no luck.
Sounds like a Bentley manual is in my future. The PO has a lot of dangling disconnected wires from the dash, though they seem to be from the radio and oil pressure gauge he installed.
I will get my circuit tester out and try to process-of-elimination the wires.
Thanks again
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wagohn
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Joined: June 24, 2014
Posts: 290
Location: United States
wagohn is offline 

PostPosted: Thu Apr 09, 2020 8:22 pm    Post subject: Re: Fuel gauge stopped working Reply with quote

Drove the bus to the gas station and because we dont know the state of the gas tank yet, put in 5 gals. The gauge came to life and now reads full - but drops slightly going uphill. Strange.
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