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-   -   Yet another gauge question: CJ (https://www.jeepscanada.com/jeep-mailing-list-32/yet-another-gauge-question-cj-8044/)

Mike Romain 11-26-2003 08:15 PM

Re: Yet another gauge question: CJ
 
Yes.

I have a dead/rusty connection on the pin on the circuit board inside
the fuel gauge for the bar.

I am only seeing 3 volts or so there and if I twist it I will get the 5
volts and things work for a real short time.

My gas gauge reads 2/3 at full and my temp gauge reads just at the cold
when fully warmed up.

Here is a good link on the gauge wiring:

http://www.monsterslayer.com/jeep/Gauges.htm

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

ABanks5@columbus.rr.com wrote:
>
> I hate beating this dead horse but...am I to understand that the jumper
> between the fuel and temp is to get the power over from the fuel to the temp
> gauge? And if this is the case,...if the fuel gauge is bad, will it send
> power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> the temp gauge then also fail to read?
> Allen
>
> 83 CJ7


Mike Romain 11-26-2003 08:15 PM

Re: Yet another gauge question: CJ
 
Yes.

I have a dead/rusty connection on the pin on the circuit board inside
the fuel gauge for the bar.

I am only seeing 3 volts or so there and if I twist it I will get the 5
volts and things work for a real short time.

My gas gauge reads 2/3 at full and my temp gauge reads just at the cold
when fully warmed up.

Here is a good link on the gauge wiring:

http://www.monsterslayer.com/jeep/Gauges.htm

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

ABanks5@columbus.rr.com wrote:
>
> I hate beating this dead horse but...am I to understand that the jumper
> between the fuel and temp is to get the power over from the fuel to the temp
> gauge? And if this is the case,...if the fuel gauge is bad, will it send
> power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> the temp gauge then also fail to read?
> Allen
>
> 83 CJ7


Mike Romain 11-26-2003 08:15 PM

Re: Yet another gauge question: CJ
 
Yes.

I have a dead/rusty connection on the pin on the circuit board inside
the fuel gauge for the bar.

I am only seeing 3 volts or so there and if I twist it I will get the 5
volts and things work for a real short time.

My gas gauge reads 2/3 at full and my temp gauge reads just at the cold
when fully warmed up.

Here is a good link on the gauge wiring:

http://www.monsterslayer.com/jeep/Gauges.htm

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

ABanks5@columbus.rr.com wrote:
>
> I hate beating this dead horse but...am I to understand that the jumper
> between the fuel and temp is to get the power over from the fuel to the temp
> gauge? And if this is the case,...if the fuel gauge is bad, will it send
> power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> the temp gauge then also fail to read?
> Allen
>
> 83 CJ7


DougW 11-26-2003 08:17 PM

Re: Yet another gauge question: CJ
 
JimG did pass the time by typing:
> I don't think so Bill. There is a regulaor of sorts inside the cluster that
> regulates the 12V ignition down to 5VDC.
> Read about here:
>
> http://www.off-road.com/jeep/tech/electrical/gauges/


Wow, that's a scary method for regulating voltages!

Providing it doesn't pull more than 1A you could use a
7805 Voltage Regulator RadioShack 276-1770, http://tinyurl.com/wqaw
to reduce 12+V down to 5V. Doesn't need any other bits to work.

If you need some other level, try the 276-1778 model. It requires more bits

--
DougW



DougW 11-26-2003 08:17 PM

Re: Yet another gauge question: CJ
 
JimG did pass the time by typing:
> I don't think so Bill. There is a regulaor of sorts inside the cluster that
> regulates the 12V ignition down to 5VDC.
> Read about here:
>
> http://www.off-road.com/jeep/tech/electrical/gauges/


Wow, that's a scary method for regulating voltages!

Providing it doesn't pull more than 1A you could use a
7805 Voltage Regulator RadioShack 276-1770, http://tinyurl.com/wqaw
to reduce 12+V down to 5V. Doesn't need any other bits to work.

If you need some other level, try the 276-1778 model. It requires more bits

--
DougW



DougW 11-26-2003 08:17 PM

Re: Yet another gauge question: CJ
 
JimG did pass the time by typing:
> I don't think so Bill. There is a regulaor of sorts inside the cluster that
> regulates the 12V ignition down to 5VDC.
> Read about here:
>
> http://www.off-road.com/jeep/tech/electrical/gauges/


Wow, that's a scary method for regulating voltages!

Providing it doesn't pull more than 1A you could use a
7805 Voltage Regulator RadioShack 276-1770, http://tinyurl.com/wqaw
to reduce 12+V down to 5V. Doesn't need any other bits to work.

If you need some other level, try the 276-1778 model. It requires more bits

--
DougW



Mike Romain 11-26-2003 08:18 PM

Re: Yet another gauge question: CJ
 
Naw, the fuel gauge only has the 12 volt power tag, then the mechanical
voltage regulator inside the fuel gauge kicks in and 5 volts goes to
both gauges via that strap.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Allen,
> The jumper is just a simple way to run power form you ignition
> switch to both gauges, it doesn't go through one gauge to get to the
> other. Then the each detects how much resistance between it and ground,
> via their respective sending units.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> ABanks5@columbus.rr.com wrote:
> >
> > I hate beating this dead horse but...am I to understand that the jumper
> > between the fuel and temp is to get the power over from the fuel to the temp
> > gauge? And if this is the case,...if the fuel gauge is bad, will it send
> > power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> > the temp gauge then also fail to read?
> > Allen
> >
> > 83 CJ7


Mike Romain 11-26-2003 08:18 PM

Re: Yet another gauge question: CJ
 
Naw, the fuel gauge only has the 12 volt power tag, then the mechanical
voltage regulator inside the fuel gauge kicks in and 5 volts goes to
both gauges via that strap.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Allen,
> The jumper is just a simple way to run power form you ignition
> switch to both gauges, it doesn't go through one gauge to get to the
> other. Then the each detects how much resistance between it and ground,
> via their respective sending units.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> ABanks5@columbus.rr.com wrote:
> >
> > I hate beating this dead horse but...am I to understand that the jumper
> > between the fuel and temp is to get the power over from the fuel to the temp
> > gauge? And if this is the case,...if the fuel gauge is bad, will it send
> > power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> > the temp gauge then also fail to read?
> > Allen
> >
> > 83 CJ7


Mike Romain 11-26-2003 08:18 PM

Re: Yet another gauge question: CJ
 
Naw, the fuel gauge only has the 12 volt power tag, then the mechanical
voltage regulator inside the fuel gauge kicks in and 5 volts goes to
both gauges via that strap.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Allen,
> The jumper is just a simple way to run power form you ignition
> switch to both gauges, it doesn't go through one gauge to get to the
> other. Then the each detects how much resistance between it and ground,
> via their respective sending units.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> ABanks5@columbus.rr.com wrote:
> >
> > I hate beating this dead horse but...am I to understand that the jumper
> > between the fuel and temp is to get the power over from the fuel to the temp
> > gauge? And if this is the case,...if the fuel gauge is bad, will it send
> > power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> > the temp gauge then also fail to read?
> > Allen
> >
> > 83 CJ7


JimG 11-26-2003 08:21 PM

Re: Yet another gauge question: CJ
 
The jumper is to get the regulated 5V to the temperature gauge. The fuel
gauge does not have to work for the temperature to work as long as the
regulator works.

--
JimG
80' CJ-7 258 CID
35" BFG MT on 15x10 Centerlines
D44 Rear, Dana 30 Front. SOA
4.56 Gears, LockRight F&R
Dana 300 w/4:1 & Currie twin sticks
Warn X8000i w/ dual batteries

<ABanks5@columbus.rr.com> wrote in message
news:7xbxb.28236$uw5.23619@fe2.columbus.rr.com...
> I hate beating this dead horse but...am I to understand that the jumper
> between the fuel and temp is to get the power over from the fuel to the

temp
> gauge? And if this is the case,...if the fuel gauge is bad, will it send
> power to the temp gauge? In otherwords,..if the fuel gauge goes bad, does
> the temp gauge then also fail to read?
> Allen
>
> 83 CJ7
>
>





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