wiring question w pic

[Lof8]

I'm about to wrap up the wiring on my swap!!
I think the wire with black shrink wrap would be a ground to the shock tower?
and the other two (red shrink wrap) would be power wires to mount to the + block on the firewall?
all wires are coming from the passenger side of the harness.



thanks

[SamE30e]

The thick one goes to the positive terminal on the firewall.

And if you pull back the cover on the smaller one, it should be red. If so it's power to the relays and should also goto the positive terminal on the firewall, if not car no start.

And the third one do the same as above, if it's red, positive, if not, ground.

[MattM]

pull back the covers and make sure, anything red you can attach to the B+ post, brown ground... :p

[e30s50dan]

some of the wires you can ohm out..ground should ohm out with the block..i think...thats how i double checked ,and like others said pull back the cover see if they are red or brown....my M50 goes in Sat..