Euro S50B30 swap question... 2 wire questions: Grounds + mystery power wire to relay

[burkey001]

Hello,

Have a question about a wire.




On the left hand side of the engine bay harness are two power wires that end near the blue fuse box. This is well known. I know I can eliminate the big red one, as it is for fuse box power and the E30 fuse box gets its power from elsewhere but what about the SMALL red wire??

I can trace it back to one of the three relays on the wire harness. It's a large enough diameter that its a power feed (well plus the color tells us that too)

Anyone have a good tip for this wire?




Second question: Grounds.
The standard harness has an awful lot of excess grounding wire in it. When you unpick the harness you see earthing wire looped endlessly around the place, with quite a lot of random earting points.

Given my reasonable levels of electrical understanding, a ground should be the shortest point to chassis, preferably in as few spots as practicable. So is it reasonable to shorten the length of a lot of these earth runs?


thanks a bunch

burkey

[7pilot]

Hook up the smaller red wire to the power take off clamp.

It is ok to shorten the ground wires, but I would advise against deleting any of them. (might cause a harness fire due to back feeding and subsequent overheating of circuits )


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