What ohm range is our sending units?

[94turboidi]

I have a tank I am installing on my truck that has a 5 bolt universal hole and I need to get a sending unit that will work with my trucks gauge. Anyone know what range would work for an accurate full to empty ohm range? Thanks

 

[RLDSL]

I could use the same information for the very same reason. I went out and bought a sender and gauge before even thinking about tapping into the factory gauge

 

[94turboidi]

Yeah I have been running on only a rear tank and I am adding an aluminum one for running my wvo and a gauge would be nice especially the factory one.

 

[RLDSL]

I put my bed tank in a couple of years ago, it's a 150 gal tank off a Volvo semi . When I went to get a sender I thought they only came one way so I grabbed one and a gauge, then I found later they had different senders for that type. ( years ago there was only one type on the big trucks) It would be real nice if I could just wire the thing into the factory gauge
I suppose I could wire teh thing up and reach down in the tank with a hook and pull up on the float and see what happens to the needle on the factory gauge.

 

[franklin2]

Here's some info I have gathered off posts through the years;

1986-earlier the sending unit is 73 ohms empty, 10 ohms full. These are actual measurements, I believe it's sometimes listed as 90 ohms-10 ohms.

1987-up 145 ohms full, 22.5 ohms empty. It's also listed as 160 ohms full and 15 ohms empty. The guy in the post who did some research on his unit(sorry can't remember who it was) got 31.8 ohms directly on E, 94.2 ohms @ 1/2, and 181.5 ohms on F.

As you can tell, so long as you get a unit that's in the ballpark ohm wise, it should work ok.

 

[tenlug]

Just went thur this. Franklin's numbers are very close. Went thur the Pick-A-Part checking. Steve

 

[94turboidi]

So a 10-180 ohm sending unit would probably work. Looking at a universal one for 25 and free shipping.

 

[Optikalillushun]

i got like 30 ohms empty, 95 1/2 tank and 160 full. original 88 F-350 rear sender.

 

[plywood]

To my recollection there were actually three different cards, that followed closely, but not exactly with the model years. Notice also that the scale is in reversed direction for the two cards mention a couple of post back.

I was able to buy just the sending card for whatever ohm range a while back for the factory sender, but would have to check and see if he is still around.

 

[bike-maker]

I also verified the ohm range between the stock 84 sending units in my truck and the ones I'm using out of a '89. I've only found 1 inexpensive gauge for 'em: VDO 301216 is about $25 / autometer 5718 is about $45.
Make sure you pay attention to which reading is full and which is empty. For example; I used 89 sending units with my 84 gauge cluster so 5/8 full on the gauge = empty, and they go clear to the left of the E when full.

 

[bigblue85]

So a 10-180 ohm sending unit would probably work. Looking at a universal one for 25 and free shipping.

where can i find a universal sending unit??? because im looking for one for my bronco

 

[plywood]

Try looking at marine stuff.