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1Back to top Go down   Car type fuel gauge adaption Empty Car type fuel gauge adaption Wed Apr 30, 2014 11:39 am

billtr96sn

billtr96sn
Silver member
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I am starting a new thread for this as I think it is different enough to the other fuel gauge thread to deserve a new one. I hope that is O.K.


In my attempts to fit a fuel gauge to my LT I bought a fuel gauge from a Land Rover defender knowing it would read odd.
 I was hoping it would read backwards, i.e. full when empty and vice versa, but all it does is read full. I have tested the sender and that is good.
Apart from spending money (that I haven't got) on a BMW gauge, is there any other known gauge that would work? Or is there a way I can use the gauge I have?


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Something witty is supposed to go here... help!! Car type fuel gauge adaption Uk-log10
http://www.billsbikechat.co.uk
    

2Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 12:23 pm

Guest

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Many car fuel and temperature gauges use a voltage regulator in the 12 volt supply to keep it at 12 volts. The electrical system can go up to 13.8 volts when charging. As both of these gauges use a variable earth, you would not want fluctuations in the supply voltages to result in fluctuations in the readings.
This may have something to do with your gauge or it may not.

    

3Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 3:44 pm

kioolt

kioolt
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I thought that most cars had regulators for the gauges that kept the voltage close to 5 volts.  I'll have to look in my Helm's manuals for my Ford vehicles to see.  I'll get back when I find out.


__________________________________________________
2004 R1150RT 186,800 miles 
1991 K100LT 128,700 miles
1982 R100RT 106,900 miles
Total 422,400 BMW miles

AMA,BMWRA,BMWMOA


The cheapest thing on a BMW is the nut that connects the handlebars to the seat.
    

4Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 3:56 pm

kioolt

kioolt
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@kioolt wrote:I thought that most cars had regulators for the gauges that kept the voltage close to 5 volts.  I'll have to look in my Helm's manuals for my Ford vehicles to see.  I'll get back when I find out.
I just looked it up for my 93 F150XLT.  In plain english in the shop manual "No instrument voltage regulator is used with this system."  The one I am thinking about must have been on my 78 Cougar.  I know it had an IVR because I changed it once.


__________________________________________________
2004 R1150RT 186,800 miles 
1991 K100LT 128,700 miles
1982 R100RT 106,900 miles
Total 422,400 BMW miles

AMA,BMWRA,BMWMOA


The cheapest thing on a BMW is the nut that connects the handlebars to the seat.
    

5Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 4:25 pm

kioolt

kioolt
Silver member
Silver member
I found this Youtube video that will probably help you out a lot.

https://www.youtube.com/watch?v=S7ccqSgfrRo


__________________________________________________
2004 R1150RT 186,800 miles 
1991 K100LT 128,700 miles
1982 R100RT 106,900 miles
Total 422,400 BMW miles

AMA,BMWRA,BMWMOA


The cheapest thing on a BMW is the nut that connects the handlebars to the seat.
    

6Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 4:29 pm

billtr96sn

billtr96sn
Silver member
Silver member
Thank you


__________________________________________________
Something witty is supposed to go here... help!! Car type fuel gauge adaption Uk-log10
http://www.billsbikechat.co.uk
    

7Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 4:59 pm

robmack

robmack
Life time member
Life time member
The sender on the Defender 90 should be 270 (full) to 19 (empty) ohms. The BMW sender is 2 (full) to 130 (empty) ohms.  It's possible that the gauge is incompatible with the sender, even if reversed.  Is it possible for you to spring on a VDO 2-1/4" gauge that is more compatible with the sender, like a VDO 301-107 ?  BMW cars and motorcycles of 80's vintage should be using similar technology, if you are going to the breakers.


BTW, you can find  the schematic for the Additional Instruments online.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

8Back to top Go down   Car type fuel gauge adaption Empty Re: Car type fuel gauge adaption Wed Apr 30, 2014 5:31 pm

billtr96sn

billtr96sn
Silver member
Silver member
Fortunately, one of the forum members is selling loads of parts, and in those parts he has a fuel and temp gauge!!  Sorted  Very Happy


__________________________________________________
Something witty is supposed to go here... help!! Car type fuel gauge adaption Uk-log10
http://www.billsbikechat.co.uk
    

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