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oil pressure switch

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hamrtime:
hi,  89 yj,  oil guage is pegged at 6 bars , replacing the oil sending unit BUT

the original one installed looks like this , its big and bulky and I see these still available online here and there:
https://www.shopjeepparts.com/product_thumb.php?img=images/17219.06.jpg&w=500&h=500

local parts store thinks its this one, also 1 wire like above , much smaller design closer looking to the later 4L sending units that have 2 wires.
http://s7d9.scene7.com/is/image/GenuinePartsCompany/NWMDC?$Product=GenuinePartsCompany/103693

anyone changed over to the new style or do I have the wrong part - like to know before I get it dirty and cant return

thanks in advance

hamrtime:
well this is all very confusing but after heating up my internet browser I finally found someone having the same part and question as me.

89 yj has oil pressure guage switch (detects oil pressure and heats choke ) and oil pressure sensor ( that runs my guage ),
so I got the wrong part ...

thanks anyway

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