I believe there will be many of you out there who at some point have considered doing an engine swap in your Mk2, but have got as far as thinking about the wiring, and then given up. It is true that this part of the conversion is the most challenging mentally, but it need not be a hurdle anymore, as you can find out what you need to know right here.

IMPORTANT THINGS TO NOTE:

• The plug designations used are from the TOYOTA Electrical wiring diagrams which I used. These are US 87 model, US 83 model.

• The wiring DOES differ between different years Mk2 and Mk3. Also by Left Hand drive or Right hand drive. My conversion was an Australian Mk2 84 model, with an 87 Japanese 7MGTE. I believe this was quite a difficult combination as I did not have any wiring diagrams specifically for these models. I worked solely from a US spec 83 diagram and a US spec 87 diagram. I have noticed there were quite a few differences between these diagrams, and what I found on my wiring harnesses, but nothing major.

• How to read plug diagrams. If single picture of plug is shown it is the MALE end. If two are shown, these will be MALE and FEMALE ends. Pin numbering starts at top left of plug (MALE). Count across left to right, then go down to next row and repeat.

• When splicing wires together. If a single wire needs to be spliced into another, it is a GOOD IDEA to have a single pin plug at the end of the sub harness, which is then spliced into the Mk2 wiring. This allows the sub harness to be unplugged in the future instead of having to remove the splice.

I have put on the site my particular diagrams which are exactly what you will need if doing this conversion in either Australia or New Zealand where all our 7MGTE’s are ex Japan.

I have also prepared US LHD diagrams as well because I want to help as many of you as possible. It didn’t take me long as I had done the ground work already :-)