1991 240SX SR Equipped. Eng Cont fuse blows..

[MeSs]

The whole thingie started when i swapped the sr20 into my ca18 equipped 240sx (200sx here in Norway)..The 3 harness plugs on the sr in the engine bay, front right side (big grey, little grey and one brown) were switched to ca18 plugs which i soldered on the sr harness (color on color, stripe on stripe, etc. all the aircondition etc were left out). This worked like a charm in one week, until Friday.The car started popping and then the Eng. control fuse blows!!!? This have been even worse, in the beginning it didn't blow when i drove normally (just when wheelspin occured, heh.) , but now it blows right after ive changed it, also with the ignition off!!!So, Where do i start?

[jdm_master_X]

something along this circuit is obviously shorted to ground. definitely check the wiring and see if a few wires are touching wires that they are not supposed to.

[MeSs]

Do i just

something along this circuit is obviously shorted to ground. definitely check the wiring and see if a few wires are touching wires that they are not supposed to.

Do i just open the fuse/relay box and follow that circuit until i find something wrong?

[MeSs]

Im going to try and find the short tommorow.. I need some tips..