As I'm not that well versed in electronics, I took my time sorting the wiring. Wanted to make a tidy job of it and pretty happy with how it turned out. Started with dissecting the EGS wiring, using the donor car harness as a guide to what's safe to cull. Cut off the plugs going to the old transmission and got rid of the excess wires by pulling them through the tubing, leaving only a few that I reused for the reverse switch wiring. Crimped on a generic plug that I'd lifted off a temperature sensor and shrink wrapped it in place.
Took me a while to figure out the fuse box side of it. There seemed to be two different ways of doing it - hooking up the two reverse switch wires to Pins 2 & 6 of X6325 according to
this guide OR tap into the black/brown wire (Pin 4) and ground the other as shown in ShopLifeTV's & 50skid's videos. Had to educate myself on how relays work to figure out that both ways will work. Decided to go with Pin 4 and ground, retaining the relay so as to not run the main current through the light switch. The black/brown wire was the last one remaining on a EGS plug after getting rid of all the wires going to the transmission so that got spliced together. For ground I just plugged into the one of the other abandoned EGS plugs. Will do for now, will tidy the remaining loose ends after I've gotten the car up and running.
On the inside I ended up also removing the steering column as I noticed the steering angle sensor being a bit too loose for my liking so wanted to check it out. Not sure how much play is normal but did notice the plastic bit on the column where the end of the pin is held in place was slightly cracked. Strengthened it with a bit of epoxy which seems to have solidified it a bit. Also fixed the annoying orientation of the column where the positioning slots on the end of the column and the steering wheel would end up on opposite sides. PO's attention to detail is a joy to behold.
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Shared with Dropbox
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Clutch switch wiring was pretty straightforward. Also did the reverse light dip wiring as per
Bali's guide. Reused the discarded wires from the auto transmission looms. Had two to play with so managed to string longer runs together with matching colours. Also disconnected the previously run cruise control wire to route it more properly. Fished the wires along the factory wiring routes wherever possible, using an old wire coat hanger to fish wires through in behind the heater core (the joys of RHD cars).
Blue - cruise control to DME Pin 27
Green - clutch switch Pin 2 to DME Pin 23
Yellow - reverse dip X11176 Pin 7 to X428
Taped together the loose wires previously going to the auto shifter and cable tied them out of the way. Also tidied up other wiring where the tape had come loose over time with some new OEM-looking cloth electrical tape. The shift cable hole got plugged with an OEM blind plug (Part #07147140849 but and 35mm plug should do) and threaded some short bolts I found to the other shifter mounting bolt holes.
Figured out why the wiring around the steering column had looked pretty hectic previously. While digging through the newest parts car I noticed the black plastic channel bolted to the side of the steering column - on Barbara it was missing completely. Lovely.
While in there... I also took out the heater core for a thorough flush and some fresh O-rings. Getting the pipes back in is an absolute prick of a job, would recommend a second set of hands when tackling this.
Ripped out the dash from the parts car that, underneath all the filth, looked in better shape than the old one. Gave it a good thorough clean with a steam cleaner and applied 2 coats of Aerospace 303 protectant to make it look nice and crisp. Dug out the armrest-less center console bit and set of cupholders I'd picked up from the wrecker's some months ago and spent a good few hours rubbing off the scratched up rubberised coating to expose the clean plastic underneath. Those also got a couple of coats of 303 to freshen them up. Cut a hole in the underside dash panel for the clutch pedal and pretty much put the interior back together. All that's missing is the shiftknob.
Three pedals at last.