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So I finally got the wiring harness through the firewall and I’m about to embark on connecting it to the main harness. ?I think once the engine is installed it will be easy enough to know what plugs where, but my immediate challenge is figuring out exactly how to connect the harness to the black box in the engine bay. ?I’m still trying to figure out what to remove and what to leave behind. ?My harness was done by AV Subaru Conversions so I know the alternator-to-starter-to-black box harness was to be removed and not used, so that’s been removed.

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The first thing I did was bundle the harness up out of the way while I figure it out. ?

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This is where I’m a bit confused. ?It can’t be all that bad since there aren’t really that many wires. ?There are two large round plugs and I think one goes to the tail lights, so the other round plug likely plugs into the round plug on the harness. ?I will follow the Smallcar installation guide and see how that works out.

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If you would be willing to share some of your knowledge or experience with this part of the conversion, please do chime in!?

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Warren

89 Westy?

88 Tintop

70 Westy

I’ve used the Smallcar diagram and Tom Shiels pages. ?I’ve identified the Ignition On and Alternator Lamp wires, I think. ?However, what is the gray wire?

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Warren

89 Westy?

88 Tintop

70 Westy

Grey/white is lighting I think. You need ign on (fuse it), battery (post from alt) fuse it, start signal (ign switch to ECU to starter solenoid circuit), CEL, coolant temp, oil pressure , tach (all thru round connector or run another wire).

Alt connects to post in black box and to starter lug. Alt light connects to blue in black box. Alt sense wire connects to battery post on alt, battery post on starter or all the way to + post on battery if you want.?