As title states, my '85 GP came from the factory with idiot lights. I am converting to the OEM option Rally gauges that actually show oil pressure and water temp. The water temp sender looks straight forward. It's on the driver side, forward part of the cylinder head. 1 green wire. Just swap it out with the gauge version. The oil sender is confusing me though. Currently it has a 2 wire switch on the back of the block near the distributor. the connector has 4 wires plugging into it. On one blade it looks like two black wires. The other blade has a blue and tan or maybe faded orange wire. The oil pressure senders "for gauges" only have 1 wire blade. So what's the trick here to convert my 2 blade, 4 wire idiot light sender to a 1 wire gauge sender? I was expecting a 1 wire sender, and found a 2 blade sender with 4 wires hooked to it.