- Wed Jan 10, 2007 5:39 pm
So far I have hidden the harnesses thar run on the inside of the bay from the back corners to the headlights & engine harness. The Headlight harnesses are in the fenders and the harnesses that were in the rear corners will now meet in the middle where the heater core hoses were. Next I have to modify the engine harness to go to the lower center of the firewall.
Since I am paranoid/anal when it comes to wiring, I am going to label everything first. I actually have my original harness, 1992 D15b7, and a D16z6 from 93-95. The difference for 1992 harnesses was the map sensor was a separate unit mounted on the firewall instead of a sensor on the throttle body. So rather then a wire/plug going to the throttle body, 1992 has a smal vaccum line.
The wire would be easier to hide, but since I will replace the stock map sensor with a motorolla 2.5 bar sensor (about the size of a quarter) in the near future, I'm going to use the setup which will allow me to switch those sensors easily. The motorolla 2.5 bar doesn't look like it would easily mount to the throttle body w/ map sensor that the 93-95 uses.
So my MAP sensor will be mounted on the inside of the firewall instead of on the outside of the firewal as it was stock. My 92 engine harness does not have the wires/sensor for the MAP, these are located on the cabin harness. However, the 1992 D15b7 harness does not have the single wire for the vtec solenoid, or the 2 wires for the oil pressure sensor on the head (to tell the ecu when to activate vtec). These are easy enough to add though, I added them when I installed a mini-me setup so it will be deja vu this time around.
I labeled the harnesses, the D15b7 and the D16z6. I set the labeled D16z6 harness aside to use as a reference just in case I cut the D15b7 one up to the point I can't tell what is what.
Next I installed the D15b7 harness:
And then start to remove all the tape & wire loom. The left side main plugs and right side main plugs will need to meet in the middle.
I just ruined some Japanese factory worker's hard work
Now after you have all the tape & plastic loom removed, you can start to lengthen & shorten any wored that you need to. I would use solder on every connection with heat shrink tubing! Also be careful what you cut:
The thicker grey & blue wires from the distributor are shielded wires. I have heard of problems coming from these wires being cut.
Overall, most of the cutting will need to be done to untangle the mess (mostly on the right side of pic) rather than to lengthen/shorten. I plan on keeping the harness as long as possible so the plugs will be on the inside of the firewall out of sight.
Also in the below pic you might have noticed the resistor box next to the engine. After the new motor/clutch have some miles and it's turbo time, I'll need to tap into the injector wires to install this for DSM 450cc's. I hope there is enough wire on the inside of the firewall to do this there to keep that ugly box out of my clean bay.
Here is where I left off untill the next episode... I'll be doing some cutting & soldering. Then last I'll re-wrap the harness
Do Not PM me your technical questions. Post them in the forum! My 1992 SOHC Turbo HatchMy Youtube Channel: 6th Gear Garage