Wiring oil pressure sender

[wahoo50]

Does it matter which terminal the wires are attached to on the oil pressure sending unit?

 

[mikestertwo]

Does it matter which terminal the wires are attached to on the oil pressure sending unit?

Need more info. What kind of oil pressure sending unit? Are you talking about a stock switch or an aftermarket oil pressure gauge?

 

[wahoo50]

Everything factory. One terminal broke off, wondering if the unattached wire can buddy up with one of the other two.

 

[mikestertwo]

Which one broke off? The center lug is for the oil pressure idiot light, the outer 2 are for the fuel pump relay bypass. A lot of guys don't even use the switch, they just leave it disconnected.

 

[wahoo50]

Cool, thanks for your help.

 

[salvageV6]

Yes it matters a lot.

The center pin B shorts to the case ground under 4psi. oil pressure to run the idiot light.

Pins A and C are the high current N/O switch that closes upon buildup of 4psi. oil pressure and provide an alternate high current path to the fuel pump.

 

[salvageV6]

Pin A is the pink/blk wire.

Pin B is the tan wire.

Pin C is the gray wire.

And and C can probably be reversed with no ill effects.