89MY ZR-1 Dash Panel Harness
 

can anyone shed some light on the differences between the Z harness and the base model year harness? assuming air option would be the same.

Kurt indicates a L98 C68 he has in stock is 99.9% similar to prototype. if that's the case, then i can source a 8K atari and use my existing harness. for some reason, i don't think it will be that simple.

thoughts?

Re: 89MY ZR-1 Dash Panel Harness
 

Yes the cluster should be plug and play.. everything should be the same except the tach as it is internally set for 8K.. but the cluster should work as far as I know

Believe it or not, GM has done somethings right.. LOL

Re: 89MY ZR-1 Dash Panel Harness
 

They are not the same. It wasn't that simple

Re: 89MY ZR-1 Dash Panel Harness
 

so an 89 6K cluster and and the 89 8K cluster harness connectors are different?

Re: 89MY ZR-1 Dash Panel Harness
 

I'm not saying the plug is different the electronics are different and it won't operate correctly.

Re: 89MY ZR-1 Dash Panel Harness
 

The harness differences are minor. Needs to be a six speed harness, have the correct air conditioning...fx3...LTPWS...that's about it.

GM was trying to release the ZR-1 in '89, so most of the hard work was done. You will have to add the fuse for the secondary fuel pump, but the connector should be there under the RH side.

The 6k/ 8k dashes are interchangeable.

:cheers:

which car you putting together, or are you building one from scratch?

Ed

Re: 89MY ZR-1 Dash Panel Harness
 

There are some gotchs when you mix 90 production ZR-1 hardware and 89 pilot ecm dis and fuel pump ckts. The 89 ecm does not control both fuel pumps whereas the 90 does. On the 89 the primary pump is controled by an oil pressure switch. The 89 dis miodule is wired differently than the 90 and if you try to use a 90 dis module on an 89 you will toast the tach ckt. Ask me how I know it took me 2 1/2 years to know just what the differences were and it wasn't until I got the wiring diagrams for both and traced the ecm/dis wiring in my 88 vs my 90 that I finally put it all togeather and got mine starting. I then discovered the 88 start calibration was very lean which made it real hard to start until I changed the calibration and increased the start pulse time by 3 times.

You need to post just what you have in mind.

Tyler