89 mazda fuel tank replacement

Mini_Truckin_Brandon

So im putting a 15 gallon fuel cell under the bed of my 89. I know the sender unit will wire to the back of a fuel gauge. But it needs key power source as well. Ive looked and cant find a fuse for ignition to wire it up. I have screen shots of the fuse locations as well. Can anyone tell me where to hook up hot wire? Or am i miss reading something here? Also I’m using the manual pump. so the hot wire is for a new gauge to read the sender unit.

MazdaMitch

The original sending unit has two wires and one is a keyed on hot best I can remember.
Power goes through it and the sending unit is resistance based and that's how to cluster knows how much is in the tank.
Are you missing wires at the tank?
If you and want to run all new wires, you can use a test light at the fuse box and see what is hot when the key is on.

Also there are several wires on the passenger side fender will that are often not used anymore after a weber swap and several are hot when the key is on. So you may can use one of those as well.
Find one using a test light.

Mini_Truckin_Brandon

MazdaMitch i appreciate it. my gas gauge stopped working, but im in the process of bagging the truck to so i have to move the tank. I brougt a fuel with a 0-90 ohm sender unit. And im gonna hook it to a new 0-90 ohm gas gauge as well so that what one diagram is showing needs power. Hopefully the fuel cell will work with my mechanical fuel pump as well.