Crown Automotive CRO-53003341X

1987-90 Jeep Wrangler (YJ)
Jeep 4.2L I-6 (258) Gasoline

* Not OEM style; modified.
*Replacement Unit-Does Not Match OEM
-Extension Must Be Added;
90 OHMS Full, 0 OHMS Empty;
Does Not Include Gasket P/N 52127833.

Recommended:
52127833 Crown Fuel Sending Unit Seal (YJ 20 Gal 1987-95 4.2L & 4.0L)

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NOTICE: This sending unit does not match the OEM sending unit.
Modification to the new sending unit is necessary to directly replace the
OE unit.

1. Ensure that all components in kit are accounted for.
2. Disconnect the negative terminal from your battery. Remove the fuel tank from the vehicle. Then remove the sending unit from the
tank.
3. The old sending unit is configured differently from the replacement unit. The plug from the OE sending unit must be spliced into the
replacement unit in order for it to be compatible with the OE harness. The recommended splicing method is with solder and heat shrink
tubing. This method will ensure a strong electrical connection and provide a waterproof seal for years to come. The wires are as
follows:

OE Sending Unit Replacement Sending Unit
Pin # Color Function Pin # Color Function
1 Black Ground 1 Black Ground
2 White or Tan Sending Unit 2 Brown Sending Unit
3 Orange Not Used

4. The fuel pick-up must be extended from where the fuel barb is on the replacement sending unit. Use the provided piece of fuel hose
and hose clamps to extend the filter so that it is about ¼” higher than the rubber isolator at the bottom of the sending unit. The filter can
now be installed.
5. Prior to installing the sending unit into the fuel tank plug the sending unit into the harness, then connect the negative battery terminal
and ensure that it functions correctly. This can be performed by cycling the float from empty to ½ tank to full to ensure the gauge reads
accordingly. The sending unit arm may need to be adjusted in order for the gauge to become accurate.
6. Once the sending unit has been tested and is accurate, disconnect the negative battery terminal, install the sending unit into the tank
and reinstall the tank into the vehicle. After everything is installed connect the negative battery terminal and ensure that the sending
unit still functions the way it should.