1989 Suzuki Sidekick Wiring

If it plugs into the oil sender, then if you have a pressure gauge that oil runs thru to the guage, then it's an oil line and eithe Suzuki or aftermarket parts store should have it, if you have an electrical(light) gauge, then the sender probably cracked, and pumped oil up into the wiring harness via the conuit covering the wire. Unplug it, if electrical, it will pull off, if mechanical, you need to unscrew the line. Determine which type you have then fix either the broken sender, or replace the oil line.