SSBP-GSR

So im trying to swap an OBD2 gsr engine into my obd1 gsr shell. My only hang up is the Alternator wiring. In my 94 gsr, the original wiring harness for the alternator has BLK/YLW, WHT/BLUE, WHT/GRN, WHT/RED. now the plug i cut from an OBD2 alternator harness also has BLK/YLW, WHT/BLU, WHT/GRN, and WHT RED. Now from everything ive found online, the OBD1 alternator harness should have a just blue wire, and a WHT/YLW, blk/ylw, and wht/blu and the OBD2 should have the colors i mentioned before. Why does my OEM harness from 94 have obd2 colors for the Alt?

OBD-1 to OBD2 / OBD2 to OBD-1 alternator

This scenerio happens when using an OBD1 engine in an OBD2 vehicle and vice versa.
When adapting an OBD2 alternator plug to OBD1 engine harness and vice versa follow this chart:
OBD1 – OBD2 plug
blue to white/red
black/yellow to black/yellow
white/blue to white/blue
white/yellow to white/green



Heres my OBD1 Plug see the colors


OBD2 Plug same colors


94 harness with same colors



How i wired the OBD2 plug into the OBD1 harness, since theyre the same color thats how i wired it. Any opinions greatly welcomed!

SSBP-GSR

this is how a obd1 to obd2 alternator plug swap is supposed to look, why do mine match, and is it hooked up correctly? Thanks!

SSBP-GSR

someone please help im going to fire it up tomorrow and hopefully this wont wreck ****. thanks!!

Rex Holes

Hey so im having The same issue here all of my wire is match colors even though one is AOBD1 connector and the other is from OBD2 … What solution were you able to find to make your alternator work Correctly? Your help is greatly appreciated