ok..remove the 2 wires and leave them connected and secure to somthing

 

Here is Before and After Diagram:

 

Diagrams don't work for me. I see 1 wire in ...1 out..then I see one wire going to a gauge. I need simple terms like what happens to the wires when disconnected. These diagrams don't do me any good.

I 'll just forget it

 

The words above didn't seem to help either... and remember, a picture is worth 1000 words..., and finally, I did email your @aol.com email address about being available to assist in person as described in your other thread.

Here is one last color coded diagram:

 

Picture...sure ..send a picture of the wires removed ...a mechanical sending unit installed..and where the "now connected pair" attached to physically..not a drawing..not a schematic.picture of completed installation..that's what I understand. Or someone else who can explain where the "two wires" are physically connected.After being removed from the original sensor..may help...I'm very sorry I started this

 

The two wires, once removed from the two post sending unit, are not connected to anything else, but spliced together to make a single wire from the single post sending unit thought the firewall, to the gauge. There are may ways to make a splice, and there will be endless arguments about the best way, so we won't open that can of worms.

Once you have that wiring sorted out, you remove the two post sending unit. I would recommend six sided deep well socket (3/4 I think) for removal. These are the long sockets that stand about 3 inches tall. Remember, righty tighty (clockwise, or like turning the steering wheel to the right), lefty loosey.(counter-clockwise, or like turning your steering wheel to the left).

In its place is where the mechanical sending unit goes. Your mechanical unit may come with, or by separate purchase, a set of adapters. Your head is tapped 3/8 NPT. That means you need to read the back of the box or a copy of the manual (sometimes these are even posted online), determine what adapters you need, what adapters are included, and if you need to go to the parts counter to get an adapter not included, or select a different product. You would use one or more line or open wrenches of the appropriate size to install the mechanical sending unit tip and any necessary adapters.

Be sure to follow the mechanical gauges installation procedure.

As an example (not necessarily a recommendation) Speedway has this unit:

https://www.speedwaymotors.com/Speed...ck,139830.html

Reading the description, you will see that it is a 1/2 NPT end, but a separate 3/8 NPT end is available for separate purchase:

https://www.speedwaymotors.com/AutoM...ting,7197.html

Additionally, for this particular unit, you will see it is listed as 12V. Not to worry, you can replace the lamp with a 6V equivalent, or opt to not use the lighted feature at all; This may be best as you will need to fabricate a mount for the gauge (hopefully a reversible so you can keep your truck nice) and getting a proper ground and wiring would require reading schematics, diagrams, and tracing wires.

 

The two wires, once removed from the two post sending unit, are not connected to anything else, but spliced together to make a single wire from the single post sending unit thought the firewall, to the gauge.

TY...explains it all

 

As I finished writing that up, I realized I had the parts to mock it up represenatively, so here ya go:





Edit: Looks like our post crossed.

 

the mechanical is on the driver's side/ I thought it would be better on passenger?

 

Both heads are tapped the same, so you are free to install either of the sending units in either head.

 

ok...I thought it was suggested in an earlier post that the passenger side is the way to go. Thanks

 

The only thing I saw discussed about the passenger side is that it is thought to run a smidge hotter than the driver side. It would be less work to only mess with removing the stock two post sending unit on the driver side and reinstalling the mechanical one there, but you are welcome to do the additional work of removing the passenger side stock unit, move it to the drivers side, and install the mechanical on the passenger side if you'd like.

 

the two wire unit is on the passenger side on My truck. I believe it's seen in the picture above. One reason I thought the mechanical sensor would go there. Thx