From what Randy has said, this 90 will have maxi fuses when we are done. If I interpreted his text message properly he'* at the junkyard getting another connector for the engine harness on the 90

I looked for the torque axis mount and I can't seem to find one. It'* hard to see down there so I felt around under the coolant recovery tank and I didn't feel any holes. There are a few around closer to the battery, but not those two close together as shown in the picture.

Project looks great, i cant wait to see it done. would you have to have any kind of special tool to get the transmission alone out

Dang, this is a cool project!! I've been away for too long!! I need to get up under my '91 to see what the possibilites are!!

The car is still at the autobody shop and will be for several more days so I decided to work on some of the electrical connections. Now you may be asking yourself, how does one work on the electrical when the car isn't around? Well, here is the game plan.

I went to a junkyard on Friday and grabbed a 10" or so length of the engine harness from a 91 SSE. Some of the colors were off but they aren't going to be used anyway. The wires that are common to both the 90 and 97 engine harnesses were soldered together. This will allow me to simply plug the two connectors together and still retain a reference for like colored wires.

On the left is the 91 engine harness connector with the grommet removed and on the right is the 97 firewall connector/grommet.


With the aid of BillBost37'* suction cup clamppy things, I soldered the connections and finished with heat shrink tubing


All of the unused wires from the 91 connector were removed to keep things neat. Later, I'll top it off with some wire looom



There is a total of 44 wires in the 97 engine harness. 9 were connected to the 91 connector and 7 (maybe 10 if I use an aftermarket boost gauge with it'* own wiring) will be unused. That leaves 25-28 to solder in the vehicle. It certainly helps to be able to do the soldering on a table rather than in a car.

Randy whats the game plan with this beast? Are you using the 97 PCM in the car? What about functions like the climate control, cruise, etc. Are those seperate systems that do not need the PCM?

FYI, I seem to recall the 96+ PCMs were all on a data bus of sorts -- various resistances were sent along the data bus to communicate with various items. This lowered the # of wires in the car. For example, if you send a 400ohm signal that is destined to the Cruise Control unit the Stereo would not interpret that signal as turning the volume up

Climate control (AC) and cruise are going to be a bit more of a challange but they still use standard LO and HI voltages rather than a multiplex system. You're right, the PCM lives in the engine bay begining in 96. This is the reason why there were only 9 common circuits between the two connectors. With the remaining 25-28 wires, most will connect to the 90 ECM harness but the others will connect to custom added harnesses. One example would be the fuel pump module. There'* no such thing in the 90.

I intend on adding two additional grommets, one on either side of the firewall, for rerouting of certain wires such as trans connector, cruise module and AC sensors. It will be oodles of fun when the dash comes off for the rest of the electrical work.

how many times has the 90 dash been out?