Question About Wiring RB20 into 240sx

Discuss the RB20, RB25 and RB26 series engines.
TwoaForteeEssex
Posts: 8
Joined: Thu Apr 10, 2008 8:39 am
Car: 1993 Nissan 240sx

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so my question is .... so in the KA harness it comes from the ECU through the firewall and splits up from there..... there are like 50 something wires all wrapped up. and on the RB harness its been cut right there... but there are only 30 something wires... i dont understand. and the FAQs on here dont really tell me what those wires are. can anyone shed some light on my situation.


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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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easy.go buy an uncut rb20 harness.

TwoaForteeEssex
Posts: 8
Joined: Thu Apr 10, 2008 8:39 am
Car: 1993 Nissan 240sx

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k done. now if i would connect the harness to the ECU i have like 5 plugs on the inside of the car... where do those go?

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mello88
Posts: 611
Joined: Tue Jul 27, 2004 6:37 am
Car: s13

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no shame eh.

The RB harness doesn't just plug into the S13 chassis, you have to splice wires and lengthen some other wires... That's what the wiring guides were written for... The plugs inside the car interface with the dash and cluster, the wires you need, their colors and their functions are explained in the wiring guides.



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