While my gas tank is out of my car. I tired to measure the ohm range on the fuel level senders. The numbers bounced all over the place. With a little help from Thermo, he told me that the range is 20 ohms empty to 160 ohms full. Mine were bad and needed to be replaced.

Stock Jaguar senders are relatively expensive, so I took one apart and the potentiometer board sure looked like a standard Ford part. The challenge was to find the least expensive way to get new potentiometer boards that fit in the Jaguar float modules.

Background information:
- I found that between 1992 and present day, Ford uses only 4 different types of senders. one of these variations is the type that s-type Jaguar uses.
- Ford numbers their sender PSxx. The range of part numbers goes from PS10 to PS200.
- I found images where 8 of the senders at least visually have the same plastic body. The sheet metal mounting plate and the float arm are different but the potentiometer housing all look to be the same.

Part numbers and prices

Application Part Number Price (Rock Auto Example)
S-type sender assy WO133 $339.00
S-type sender only (Not found) $165.00 (I found it listed for sale but no P/N)
Lincoln LS/Thunderbird PS95 $65.79
No listed apps PS84 $68.79
Ford F-250, F350, F450 PS82 $140.79
*Lincoln Continental PS90 $29.99
Ford Escort PS92 $164.79
Ford Mustang PS93 $129.79
Ford Thunderbird. LS PS143 $677.79 (Complete fuel assembly)

*The senders I purchased to test/use.

Findings/Conclusion

- I purchased the SP90 Lincoln Continental sender for $29.00 each with free shipping off of amazon.
- The potentiometer housing and potentiometer are a match.
- I swapped the housing and potentiometer onto the s-type base plate and used the S-type float arm. (15 minute part swap for both senders)
- I measured the ohm range. I got 15 ohms at the lowest setting, followed by 20 ohms at the next position, then a smooth increase to 160 ohms at the top position. - If I had the time and money, I would purchase the PS94 LS sender assy and measure the Ohm range. to see if they are at 15 ohms to 160 or 20 ohms to 160 ohms. In my case it doesn't matter because I have to recalibrate my GM 38ECM for the Jag senders anyway. What is 5 ohms on an empty tank anyway (LOL)

Thus as I wanted I found a very cost effective way to replace the senders!

This does make me ask why do they sell basically the same assembly from $29 to about $170? When all the senders are basically the same. A float arm that is a bit longer or shorter and a stamped metal plate. The mfg. cost has to be within a buck! Varying pricing strategies to suck as much money out of us as they can.

Scenario example. Marketing 101

"It is a Mustang or a Jaguar! If they can afford the car then lets charge them more for the spare part. Oh, you have a 1998 to 2001 Lincoln Continental piece of crap car, there is no demand to keep these cars running, so lets only charge $29.00 each"

Enjoy!

 

I think you nailed it!

Well done