Sho to slo - dash wiring

[strykr14]

OK, I am considering swaping the drivetrain from my 92 MTX SHO wagon into a 93 sable wagon w/a 3.8 (blown head gasket - but perfect body - not a spot of rust anywhere - no dings either). I am still in the considering stage. Why? look under the rust rust rust post in the body section.

I would drop the SHO subframe, then move my SHO motor/tranny to a new non rusted MTX subframe that I just bought, drop the SLO sub out of the sable and bolt in the new SHO subframe/motor/tranny. I have all new suspension on order (struts, springs LCA, tie rods. tension rods, sway bar links, 95 spindles, new half shafts, PBR calipers. sway bar. I would grab the SHO seats, center console, steering column, clutch pedal. Both cars have ABS, the sable does not have an EATC - regular 3 dail AC. Would the SHO AC compressor hook up to the Sable AC wiring and lines?

My big fear is the dash. If I did this I have 2 options, grab my black dash out of the SHO - big job just got bigger - or stay w/the sable dash. What would I need to do here - swap computers then plug the SHO wiring harness into the car wiring harness from the computer - or would I need to grab the SHO wiring from the computer all the way to the firewall?

 

[rubydist]

The smoothest way would be to swap the entire dash from the SHO into the Sable, along with the front body wiring harness and engine harness from the SHO. Moving the dash isn't that huge of job, and in my opinion its less painful than working through all the wiring diagrams to rewire whatever needs rewired (which there will be, since the Sable does not have eatc, etc.)

 

[strykr14]

OK, so grab the dash out of the SHO - it would be great if I was able to take off the extranious stuff and then unbolt the dash, unplug the harness at the firewall and pull it through, but I am thinking that that would be too easy. So, from what I have reasearched, mist guys that do this unplug the harness at the dash pull the dash and replace but I would also need the wiring out of the MTX - so how would it come out? Through the firewall?

 

[rubydist]

When I did a dash swap, I left the dash wiring harness in the dash and pulled that big connector through the firewall. There is a huge hole w/ a grommet that the wires go through, and once you undo that grommet, the wire bundle pulls right through with no problems.

One thing you might need to also swap would be the wiper motor - the wiring to that changed from 93 to 94+, I'm not sure if 92 & 93 are the same or not.

 

[strykr14]

When I did a dash swap, I left the dash wiring harness in the dash and pulled that big connector through the firewall. There is a huge hole w/ a grommet that the wires go through, and once you undo that grommet, the wire bundle pulls right through with no problems.

One thing you might need to also swap would be the wiper motor - the wiring to that changed from 93 to 94+, I'm not sure if 92 & 93 are the same or not.

What year was the car you pulled the dash from - I have heard that 92's have one big harness that goes from engin into the firewall.

And would I have to switch out hearer cores - I would like to avoid that...

 

[rubydist]

I put a 94 dash into a 93. I also have engine wiring harnesses from a 92 as well - the 92 harness is different from the 93, but I'm almost certain that they all have that large connector that sits behind the airbox (but they are wired differently).

Changing the heater core is no big deal once the dash is out....

 

[strykr14]

So, if thats the case, I will need all the wiring from the 92 then?

 

[rubydist]

That's what I was trying to say earlier - I'd use the dash w/ wiring from the 92 along w/ the engine harness and front body harness from the 92. You should be able to swap all that over relatively painlessly.