my latest youtube upload

[joe231]

Originally Posted by 68 TT

Sounds like it is grounded out or left open somewhere in the sender wire. Not enough sleep to remember how it works right now. Zero ohms is empty and 90 ohms is full if I remember right so I think it is grounded out.

correct
if it is open (infinity Ohms) it will read past full, if it is grounded (zero Ohms) it will read empty. I'm guessing you have a pinched or scraped wire allowing it to go straight to ground. Or an issue where the wire goes into the sender.

[78-5.3]

Originally Posted by joe231

correct
if it is open (infinity Ohms) it will read past full, if it is grounded (zero Ohms) it will read empty. I'm guessing you have a pinched or scraped wire allowing it to go straight to ground. Or an issue where the wire goes into the sender.

ok so i will connect the gauge wire coming from the tank to the left hand pin
and the 12v to the right hand pin

then ground out the lower middle pin

i have a brand new gauge in a box i will try it tomorrow if it works the problem is in the custer if it dont its in the wire back to the sender!!!!! rght?

[78-5.3]

ok i tested the gauge when i have it all connected it goes to empty if i remove the ground wire it goes to full ??

[68 TT]

Originally Posted by 78-5.3

ok i tested the gauge when i have it all connected it goes to empty if i remove the ground wire it goes to full ??

I noticed you connected a ground wire jumper from the tach to the fuel level gauge in one of your earlier pics. I don't remember seeing that on the original posters pics. Try removing that jumper and see if anything changes.