BD/BG ECU harness removal help

[Patrick Olsen]

I'm still futzing around with the world's longest engine swap project (EZ30 into my '97 2.5GT, started in fall '13). I have the dash removed and would like to get the old engine wiring out of the way. There are 2 big-ass wiring pass-through grommet thingies that go through the firewall. I pulled out the A/C evaporator, which allowed me to pull one big grommet into the car so I could clean up the wiring (as seen here)...

https://sl-i.net/FORUM/images/imported/2015/05/harness20firewall20passthroughs-1.jpg

However, the other one, the one on the right in the picture, I can't quite get to. Is the only way to get that one to pull the frickin' heater box out? And the only way to do that would be to pull the dash beam, right? I filled the cooling system already, so I'll be rather annoyed if I have to drain it back out so I can pull the heater box out of the way. I hate rework, even if it's something relatively simple. :cwm10:

Thanks,
Pat

[duncanm]

I originally posted this in the Swaps & Conversions forum, but haven't gotten any responses, so I figured I'd try here to see if a different audience will chime in. :)
I can't quite get to. Is the only way to get that one to pull the frickin' heater box out? And the only way to do that would be to pull the dash beam, right?

if its anything like a BE/BH, then yes and yes.

The harness runs along the firewall behind the heater/AC box to the ECM. You'll also have to degas the AC so the box can come away from the firewall.

Not a difficult job, just takes a fair amount of time and patience.

[Dead91silvia]

Merged both threads....

If you are doing any wiring merge in a bd/bk/bg, the dash will really need to come out.

This thread should help you out with how much work it it to pull.
https://sl-i.net/FORUM/showthread.php?14956-DIY-Heater-core-replacement-in-BD-BG-BK

[Patrick Olsen]

I suppose I knew the answer to my question, I was just hoping there was some cleverness that would let me avoid the re-work. Fortunately the A/C system is empty, so when I pulled that portion of the dash's guts out I didn't have to worry about evacuating the system.

https://sl-i.net/FORUM/images/imported/2015/05/dash20removal1-1.jpg

https://sl-i.net/FORUM/images/imported/2015/05/dash20removal2-1.jpg

It's blocked from view in those pics, but the other penetration through the firewall is only a couple inches to the left, just far enough that I can't really work it out of the firewall to pull the wiring back through. Ah well - long weekend coming up means I can play with all of this stuff.

[meepers]

Ahhhh the fun of harness shenanigans. It looks like this may be in my immidiate future as well as I have an intermittent dead short somewhere in the 12v line that feeds everything the car needs to run. I have had to push/tow/walk 2x this weekend because of this. Grrrrrr. I just need my car back! Electrical is generally not HARD.... but it does take patience and requires MUCH paying attention. It is very easy to do bad things to lots of stuff if you are not methodical.

[TreyHamik]

Your a/c system shouldn't need to go anywhere....

Looks like what you've removed this far is only the heater core.

It's much easier if you just take out the dash support, and carefully slice the big gromett. As you'll need all the heater ductin out of your way. There's enough room to slide the wires slightly, but not enough to pull the larger connectors through.


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