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What all wiring adapters do I need to swap a 95 wiring harness into my 93 I know the opti, iac, coil, wiring plugs are different what can I do besides buy a 93 harness to make this 95 work? Can I buy a 95 coil will it work with my opti? Thx for all the answers...
 

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If your 93 is an automatic trans, the 95 wiring harness & pcm are going to expect to have a 4L60E trans to plug into. The 93 used the non electronic 700R4 trans.

You would have to make sure the torque converter wiring is correct. And you still have the problem of the 95 PCM expecting to see a pulse width modified ( PWM ) torque converter solenoid. And 95 pcm would need to be reprogramed to get rid of electronic trans controls.

93 uses unheated O2 sensors. While 95 uses heated O2 sensors. So you would need to install heated O2's into your 93.

I would also download the 93 & 95 factory service manuals to aid you. Both have full wiring diagrams, instrument cluster pinouts, and PCM & ECM pinouts to aid in your conversion.

Get manuals at www.mediafire.com/?40mfgeoe4ctti

The items you mentioned in your post would need to be changed as well.

Don't throw away your 93 ECM as it's worth about $200 at today's prices.
 
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