I purchased a 1991 Toyota supra 7MGTE R154 in January. I have been working on it ever since. (in upstate ny with no garage) I have done a lot of research on this forum and fixed many issues with the car.
The issue im having, causing me to make my first post ever on a Supra forum, is with the main harness that plugs into the coil pack harness. I was removing the coil packs to replace the plug wires and with a soft touch the blue/yellow wire (I believe) broke off of the connector. the black wire was also loose and falling out. after trying to remove the other two with a small tool I made, the plastic was very brittle and broke. I bought a new coil pack harness (driftmotion) and found a good write up on this forum which pointed me to a place to buy new .090 connectors. I bought both male and female as they were not compatible with the toyota connectors, only the wires and terminals. I cut the connector off the new coil pack harness and fitted the new one to it. the way the terminals fit were not comparable to stock. lets say the stock harness had a green wire going to the top right...the way the terminals slid into the new connector would make that green wire be at the bottom left. (just an example) so i figured out the differences wired it up and gave it a shot. the engine would not turn over. I thought about how before I pulled the rest of the broken wires out of the connector, I made a diagram. I made the diagram based on facing the BACK of the connector, clip on top. When i configured all of my wiring, I made diagrams of the wires facing from the FRONT, as well as the "broken wire clip." basically, I read my original diagram wrong. (front instead of back) so I rewired to compensate for this and still no luck.
It would be great if someone could just look at their car to see what color wires go together from the main harness to the coil pack. As far as ive researched, the coil pack harness' are all the same (green,tan,black,white.) The main harness' can differ. Mine consists of a black/orange wire, yellow wire, blue/red wire, and a blue/yellow wire.
Yes, it would have been so much easier, less time consuming, and lazier to just ask the question directly above. I guess im hoping all the extra literature about my experience will help people understand that I am accomplishing things on my own without asking dumb questions on forums.
The issue im having, causing me to make my first post ever on a Supra forum, is with the main harness that plugs into the coil pack harness. I was removing the coil packs to replace the plug wires and with a soft touch the blue/yellow wire (I believe) broke off of the connector. the black wire was also loose and falling out. after trying to remove the other two with a small tool I made, the plastic was very brittle and broke. I bought a new coil pack harness (driftmotion) and found a good write up on this forum which pointed me to a place to buy new .090 connectors. I bought both male and female as they were not compatible with the toyota connectors, only the wires and terminals. I cut the connector off the new coil pack harness and fitted the new one to it. the way the terminals fit were not comparable to stock. lets say the stock harness had a green wire going to the top right...the way the terminals slid into the new connector would make that green wire be at the bottom left. (just an example) so i figured out the differences wired it up and gave it a shot. the engine would not turn over. I thought about how before I pulled the rest of the broken wires out of the connector, I made a diagram. I made the diagram based on facing the BACK of the connector, clip on top. When i configured all of my wiring, I made diagrams of the wires facing from the FRONT, as well as the "broken wire clip." basically, I read my original diagram wrong. (front instead of back) so I rewired to compensate for this and still no luck.
It would be great if someone could just look at their car to see what color wires go together from the main harness to the coil pack. As far as ive researched, the coil pack harness' are all the same (green,tan,black,white.) The main harness' can differ. Mine consists of a black/orange wire, yellow wire, blue/red wire, and a blue/yellow wire.
Yes, it would have been so much easier, less time consuming, and lazier to just ask the question directly above. I guess im hoping all the extra literature about my experience will help people understand that I am accomplishing things on my own without asking dumb questions on forums.
