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RB20DET wiring question

Ed G

By Ed G,
in Engines & Forced Induction

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Ed G Grand Master

Ed G

Posted
Posted

Hi all,

Just finishing up my RB20det wiring and chasing a diagram for 2 of the plugs that head from the ecu over to the drivers side (pictured). Also after their corrosponding ecu pinouts (have the ecu pinout diagram already). Have searched a fair bit but cannot seem to find the diagram for these 2.... this pic is a little crappy, i can get better ones if needed...

Thanks :)

Ed.

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BH_SLO32 Proficient

BH_SLO32

Posted
Posted
Hi all,

Just finishing up my RB20det wiring and chasing a diagram for 2 of the plugs that head from the ecu over to the drivers side (pictured).  Also after their corrosponding ecu pinouts (have the ecu pinout diagram already).  Have searched a fair bit but cannot seem to find the diagram for these 2....  this pic is a little crappy, i can get better ones if needed...

Thanks :)

Ed.

Ed,

I have recently traced the wires on a manual loom. Can't quite figure the orientation of the photo, is it the original R32 loom? Is it an automatic loom? I think I know the plugs you are talking about but if you could take some close-up photos of the 2 plugs I can confirm.

Cheers

  • 1 month later...
BHDave Grand Master

BHDave

Posted
Posted

You are going to have to trace them back to the ecu/engine loom, i never found a diagram for the under dash plugs. Pick up a cheap multimeter with continuity tester to make it easier.

It looks to be a late model r32 gts-t loom (same as my old one) and the plugs have a combination of tach out, fuel pump trigger, water temp gauge, speed sensor input, all the consult outputs and a heap of other stuff i cant remember.

The other 2 plugs are mainly for the wipers from memory with a few other bits and pieces thrown in.

Somewhere in the 4 plugs there is the wiring for the dropping resistor for the fuel pump speed control, the output wire for the fuel pump speed, 2 wires for some water temp sensor for the climate control and a couple that run to the main power plug in the engine bay.

GTR-Ben Proficient

GTR-Ben

Posted
Posted

Edit: that looks like the dash part of the loom? Is that Skyline or Silvia. Shouldn't need to remove that for the conversion unless you want to use the RB cluster..

Those plugs are listed on the RB20/RB26 wiring diagram. They both share similar colours however..

Blue/black for water temp gauge

black/pink for fuel pump

yellow/green for speed

red/yellow for tacho.

Think these are right.. or close :)

To find the right plug of the two, check continiuity between the temp sender (single blue/black wire) in the engine bay and the blue/black wire under the dash.

All the wires under the dash should be the same colour on the Silvia as the RB. The only wire not there is the fuel pump black/pink. The Black/pink wire on the Silvia is in the engine bay. I think you need to run power to your O2 sensors etc also.

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