Fuel sender - Warning light

[mmt 14]

Hi Guys, 

there is no fuel gauge in my car. The fuel level sender unit is however still in the tank. 
 

Would it be possible til wire a light to the sender to turn on when the fuel level is getting low? 
 

thanks. 
 

/M

[jackherer 543]

Yes, there is a separate terminal on the sender for the low fuel light. If you put an ignition switched +12v feed to one side of a bulb and connect the other side to the sender in the tank it will light up when the fuel is low. You'll need the original (or a new) ground connected to the sender too obviously.

[mmt 14]

Great- Thanks. 
 

Which pin is What? 1-2-3 counting from left?

 

no. 44 is the sender unit. 65A is the warning light switch. How do I find out which pin(s) to use? 
none of the original wiring is in the car. Stand alone ecu also. 

do you know? 

Edited May 30, 2020 by mmt

[jackherer 543]

Sorry, I'm not sure. Ultimately I ended up connecting to the other end of the wire that previously plugged into the instrument cluster as I have an aftermarket dash.

[mmt 14]

Ok Thanks. 
 

is there any Way to test which pin is which without removing the sender from the tank. 

[mmt 14]

Hmmm

 

if I run the ground through pin 2 or 3 and the light with switched + to 3 or 2 or Vice versa the light i constantly on. 
 

if i use pin 1 in any combination with 2 or 3 the light is off. 
almost full tank. 
 

any thoughts? 
 

thanks. 
/M

[jackherer 543]

It's probably pin 1 and 2 then I would have thought.

[mmt 14]

Thanks. 
Do you mean:

pin 1 To Ground 

pin 2 To light bulb

 

or 

pin 1 to light bulb 

pin 2 to Ground? 
 

been trawling the internet nothing of use- thought everything was to be found on there. 
 

thanks again

 

/M

[jackherer 543]

I would have thought pin 2 would be the common ground.

 

As it's just a switch it doesn't really matter if you are using it by itself (i.e. without the gauge part)

[mmt 14]

Great Thanks. 
 

I’ll connect it and make it drink a lot of fuel :-)