I'm putting my 2000 LT back together after a main seal/clutch plate/gearbox job.
I was about to start plugging the fuel injector connectors in when, to my dismay, I counted (6) identical connectors. Obviously, (4) of those are for the injectors, and the other two are for something else.
I'm pretty certain I know which ones are for the injectors, but I'm not too sure about the other two. We'll call those "A" and "B".
One of them is for the temperature sensor on the air cleaner box. I'm sure once I mount the air cleaner box I'll be able to tell if its connector "A" or "B". However, I've been looking around and I can't figure out where I disconnected the other one from.
Because the 3 or 4 pins connectors are pretty much impossible to confuse, lets concentrate on the many 2 pins connectors of this left engine side:
1) A single 2 pins connector for the sensor attached to front of AIR-BOX is easy because its wire is longer than all other 2 pins connectors of this side. Just to be 100% sure, confirm that you see 1 wire BROW-YELLOW and the other wire BROWN-BLUE (unique combo of colors for this side)
2) All 4 injectors connectors look the same except for minor wire length difference because of location they go (injector 1 to 4 front front to rear). They all have the same wire colors for their 2 wires (GREEN-WHITE and YELLOW-GRAY). Because these BOSCH MOTRONIC are batch injection system, you could plug any of these 4 into any injectors and it would work the same. However, the wire length from harness is the clue which goes where (avoid undue pulling or stress on wires).
3) FINALLY, the remaining 2 pins connector that looks identical to the 4 injectors connector goes to the Charcoal canister vent valve (also called PULSE valve in manual). This PULSE valve is attached in front of the throttle bodies and has 2 vacuum hose (linked into the 4 small vacuum hose setup on 1 side - to the charcoal canister on the other side).
IMPORTANT NOTE 1: To avoid confusing the PULSE valve connector with one of the 4 injectors connector, confirm that this one has different color wires (1 is GREEN-WHITE, but the other wire is GREEN-BLUE).
IMPORTANT NOTE 2: if your K1200LT was not built for the USA market ..OR.. if it has been modified by previous owner to remove charcoal-canister, then you may NOT have a PULSE-valve in front of the throttle bodies. In such case, the connector can be left opened and zip-tied to fuel rail.
I can see a PULSE-Valve in your Photo, but I want these instructions to be "generic" and be able to help someone else in future that may have an Euro spec (or CANADA Spec) K1200LT where no PULSE-Valve is installed.