Black/white wires were also used for the front fogs in the 940 series. 740 harnesses are probably more similar to 940 wiring harnesses than 760/960 wiring harnesses. At some point after 1989 the 740s obviously changed from the violet/white fog light wire before the end of 740 production, which I find a bit odd as nothing much else changed in the final couple of years. The locations of relays and fuses with the 760/780/960s were quite different from the 740/940s so wiring harnesses were also often quite different, although there was likely some degree of consistency in the colors when the same engineers and harness suppliers were involved. A 760 manual is certainly better than no manual at all, especially when looking at common components and things like engine wiring for the B230FT used in both series.
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now