Hello all, I’m converting my 72 Cutlass from the warning lights to the gauges. I removed the warning light/fuel gauge, re-pinned the connector moving the wires to the proper locations and installed the gauge unit. Moving under the hood I installed the gauge sending units for both the temperature and oil. The wiring harness connectors for the warning lights temp and oil pressure sending units are different and I can’t plug into the new sending units. The gauge temp sending unit has a pin or nail head type vs a spade or blade type for the warning light sending unit and the gauge oil pressure sending unit a blade type but with a bent over hook on the end. Short of having to buy a new engine wiring harness and I can’t find the proper connectors. Any help would be greatly appreciated! Thanks!

 

72 had an extension wire to connect from the warning light plug in the harness to the gauge sending unit.
Lectric Limited has reproductions for $27.00

https://www.lectriclimited.com/produ...xtension-wire/

The black plastic end on the temp sending unit wire has a slot to use with the pin-type sending unit. You can de-pin the connector from the plug and grind a slot in your original, or buy a slotted plug to put on your original terminal.

https://www.summitracing.com/parts/a...MaAu-XEALw_wcB

 

Thanks for the info! My current connector end for the temp sending unit is blue. Wonder if that is correct for a gauge package engine wiring harness and?

 

Maybe post some pics of the connectors you have now.

 

I did the same swap, but I sourced the sensors from Ames off their GTO catalog so I wouldn't have to change any sensor connectors.