wiring color codes for 240sx from 89 to 97 - Nissan Forum Jun 09, 2003[quote=" nraf NOTES:*2 There are two (2) red/blue wires in the ignition harness, one is forparking lights and the other is for the right headlight. with the accessory relay. How to MegaSquirt Your Nissan 240SX - DIYAutoTune The specifics of the input wiring will depend on which year 240 you have; Nissan changed the wiring colors in 1991. However, the wires serve the same purpose; only the colors changed. Note that these years apply to the 240SX and are not the same for other KA-powered vehicles.