Watertank Electrical Connections
- Thread starter voyager
- Start date
Yes Manny,
Thats what I thought might be the case,
but its been awhile since I removed it.
Thanks for your prompt response.
Rob Teed 74 Painted Desert
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of MTrovao
> Sent: Sunday, April 11, 1999 9:29 PM
> To: gmcmotorhome
> Subject: Re: GMC: Watertank Electrical Connections
>
>
> last fall. Can't remember where the wires
> go. One White,One Yellow. Only one post.
> ????? Help!
> Thanks,
> Rob Teed 74 Painted Desert
> ( Trying to be road worthy by May ) >>
>
> On mine, the white wire is ground, attatched to one of the screws. Yellow
> goes to post.
> Hope you're writing about the tank sending unit.
>
> Manny Trovao 73 Custom/ex-Glacier
>
Thats what I thought might be the case,
but its been awhile since I removed it.
Thanks for your prompt response.
Rob Teed 74 Painted Desert
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of MTrovao> Sent: Sunday, April 11, 1999 9:29 PM
> To: gmcmotorhome
> Subject: Re: GMC: Watertank Electrical Connections
>
>
> last fall. Can't remember where the wires
> go. One White,One Yellow. Only one post.
> ????? Help!
> Thanks,
> Rob Teed 74 Painted Desert
> ( Trying to be road worthy by May ) >>
>
> On mine, the white wire is ground, attatched to one of the screws. Yellow
> goes to post.
> Hope you're writing about the tank sending unit.
>
> Manny Trovao 73 Custom/ex-Glacier
>
Yellow lead should be 12 volts and white ground. Put the white one under a
hold down screw for the sender and yellow to the terminal.
>I am reinstalling the watertank I removed
> last fall. Can't remember where the wires
> go. One White,One Yellow. Only one post.
> ????? Help!
> Thanks,
> Rob Teed 74 Painted Desert
> ( Trying to be road worthy by May )
>
>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
hold down screw for the sender and yellow to the terminal.
>I am reinstalling the watertank I removed
> last fall. Can't remember where the wires
> go. One White,One Yellow. Only one post.
> ????? Help!
> Thanks,
> Rob Teed 74 Painted Desert
> ( Trying to be road worthy by May )
>
>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
Emery my friend. I respect your knowledge of the GMC but on looking at the
schematic for the water sender, the yellow lead comes from the meter for
sure, but on the other side of the meter is 12 volts and the current flow
from the meter through the yellow lead to the water tank sender (the
resistance changes as the water level changes) determines the water meter
needle positionm. If you connect the black lead to the sender and the black
to the case, the meter will read wrong.
>
>
>hold down screw for the sender and yellow to the terminal. >>
>
>Rob & Tom -- the yellow lead is not 12 Volts. It is the ground lead coming
>from the Water Tank Meter. The sender unit is just a 90 ohm variable
>resistor in series with the ground wire. That's why it doesn't matter which
>lead goes to the terminal and which lead goes to ground the sender unit.
>You'll get the same resistance reading on the meter.
>
>If the yellow lead were 12 volts you would blow a fuse if you connected it to
>ground. In fact, if you connect the yellow lead direct to ground the water
>meter will show above the full tank mark on the gauge. This is a good way to
>test your gauge.
>
>Emery Stora
>77 Kingsley
>Santa Fe, NM
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
schematic for the water sender, the yellow lead comes from the meter for
sure, but on the other side of the meter is 12 volts and the current flow
from the meter through the yellow lead to the water tank sender (the
resistance changes as the water level changes) determines the water meter
needle positionm. If you connect the black lead to the sender and the black
to the case, the meter will read wrong.
>
>
>hold down screw for the sender and yellow to the terminal. >>
>
>Rob & Tom -- the yellow lead is not 12 Volts. It is the ground lead coming
>from the Water Tank Meter. The sender unit is just a 90 ohm variable
>resistor in series with the ground wire. That's why it doesn't matter which
>lead goes to the terminal and which lead goes to ground the sender unit.
>You'll get the same resistance reading on the meter.
>
>If the yellow lead were 12 volts you would blow a fuse if you connected it to
>ground. In fact, if you connect the yellow lead direct to ground the water
>meter will show above the full tank mark on the gauge. This is a good way to
>test your gauge.
>
>Emery Stora
>77 Kingsley
>Santa Fe, NM
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
