Quote:
Originally posted by Lloyd Burns
Perhaps you have a different picture than appears in my copy of the hardcopy manual. In mine, the left ends of the devices go to different connections on the fuse block.
The notation you to which refer appears on the block to the right of the devices, and refers (IMO) to the action of Blue and Red Spikes.
As stated before, the operation of this connection is counter-intuitive (0 = on, 1 = off), and could become dangerous in the (perhaps unlikely) event that the wires to the valve get shorted.
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The way I interpret this, the left end is the Relay and the right end is the fuse block. I read it this way because the left end simply says "+" and "-", which correspond to the "M+" and "M-" outputs on the relay (this labels on this should probably be changed to "M+" and "M-") whereas the other side says Ground OR +12V, which implies that it is the fuse block, because neither of the relay outputs are labeled Ground or +12V. This interpretation is supported by looking at Figure 2.3, where they use the same labels "+" and "-". In this case, those labels must refer to the relay outputs, because hooking those diodes straight up to the battery would make absolutely no sense whatsoever...
Bottom line: Regardless of FIRST's lack of effective visual communication skills, hook up your relays the way you first suggested (one side of each device to Ground, the other side to M+/M-) and you won't have problems...