fuel gauge voltage regulator

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Curtis
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Re: fuel gauge voltage regulator

Post by Curtis » Mon Sep 16, 2013 12:41 pm

With Nissan continuing to NLA our parts I asked Robert at Younker Nissan about the GVR. He told me that the 80’s & 90’s cars used them. Said they would be about $50 for those who don't want to build one.

After searching I found the part number and a picture. 3 wires, ground, 12v, yellow and gauge, blue.

24866-54A00

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Re: fuel gauge voltage regulator

Post by prosantos » Mon Sep 16, 2013 12:48 pm

have you or any one try this??

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Re: fuel gauge voltage regulator

Post by prosantos » Mon Sep 16, 2013 12:49 pm

what is the voltage in and out in the original regulator??

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Re: fuel gauge voltage regulator

Post by Curtis » Mon Sep 16, 2013 12:53 pm

prosantos wrote:what is the voltage in and out in the original regulator??
According to what I found it is the same 12 in and 8 volts out as the original.
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Re: fuel gauge voltage regulator

Post by Curtis » Mon Sep 16, 2013 12:55 pm

prosantos wrote:have you or any one try this??
Just found it so no I haven't tried it yet.
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Re: fuel gauge voltage regulator

Post by Curtis » Mon Sep 16, 2013 12:58 pm

There's a couple pictures of it here.

http://www.nissanpathfinders.net/forum/ ... emp-gauge/
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Re: fuel gauge voltage regulator

Post by Curtis » Mon Sep 16, 2013 1:39 pm

The snippet I read says this is supposed to be the improved one. I'll bet if you opened it up it has the same $2 part you can get at Radio Trash.
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Re: fuel gauge voltage regulator

Post by caraddict » Mon Sep 16, 2013 2:10 pm

Curtis wrote:
prosantos wrote:what is the voltage in and out in the original regulator??
According to what I found it is the same 12 in and 8 volts out as the original.
The regulator that you are building will work however you will most likely need to tweak your temp and fuel a bit to keep them accurate. The original regulator does not put out a fixed voltage at all but puts out a pulsating 12 to 14 VDC which essentially goes from full power to no power every second or so.

We have found that 6.5 to 7 volts DC seems to be about the "middle ground" and works best when calibrating the fuel and temp gauges so as long as you don't mind tweaking the gauges down a bit then 8 volts will work fine.

Hope it helps

Jon

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Re: fuel gauge voltage regulator

Post by prosantos » Mon Sep 16, 2013 3:39 pm

OK, so how can I bench test a regulator???

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Re: fuel gauge voltage regulator

Post by Curtis » Mon Sep 16, 2013 4:12 pm

I'm of the thought that if this what Nissan replaced our roadster ones with in later cars for the same gauges, fuel and temp that this should work.
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Re: fuel gauge voltage regulator

Post by prosantos » Wed Sep 18, 2013 9:25 am

help, having two issues,
#1= if I ground the regulator it goes down to empty,
#2 = when not grounded and ignition on it seems to work ok but when I start the car it goes all the way up to full.
(car has 3/4 tank of gas)
any suggestions?????

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Re: fuel gauge voltage regulator

Post by spl310 » Wed Sep 18, 2013 12:08 pm

Maybe reverse the wires?
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Re: fuel gauge voltage regulator

Post by caraddict » Wed Sep 18, 2013 12:20 pm

prosantos wrote:OK, so how can I bench test a regulator???
prosantos wrote:help, having two issues,
#1= if I ground the regulator it goes down to empty,
#2 = when not grounded and ignition on it seems to work ok but when I start the car it goes all the way up to full.
(car has 3/4 tank of gas)
any suggestions?????
You can bench test the regulator by applying battery power to the input side (Marked IGN) while grounding the case. Then hook an analog meter to the output side. (The side that goes to your fuel and your temp.) You want to use an analog meter because you need to watch the sweep and a digital unit will be all over the place. Once you apply the power, your analog meter should read the same voltage as your primary input (Battery) but will only do that for about 5 seconds and then start pulsating between zero and 7 VDC. If it stays full scale or does not pulsate then it's a bad unit.

Based on the way your gauges are running it sounds like you might have the input and output lines on your regulator backwards. It won't do any permanent damage but will make the gauge read full scale for about 5 seconds and then drop off to zero because you are essentially opening the regulator permanently. I would try switching the two leads and see what happens.

Hope it helps

Jon

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Re: fuel gauge voltage regulator

Post by dbrick » Wed Sep 18, 2013 9:05 pm

Jon, any knowledge on the VW unit? looks close, from reading, seems to run in the same range. Datsun was notorious for copying good engineering, and the VW fuel sender runs in the same ohm range.

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Re: fuel gauge voltage regulator

Post by caraddict » Thu Sep 19, 2013 9:45 am

Hi Dave,

I haven't seen or heard of the VW unit but I'd love to check it out if you have one or know where one is?

Jon