Wiring guru help please!

[thewormman]

So got my new loom for my 76 A4 all good, started fitting it and under the tank I have one blue wire on the loom with a single female connector one blue/white wire a single male connector, A and B in the picture.

From the right hand handle bar switch block I have one blue wire with a single male connection and a blue wire with a double female connection, marked C and D

From the left hand switch block I have one blue wire with a single male connector marked E.

Now my memory has failed me and I have second guessed myself so much I cant remember what goes where! (didn't take a picture of this bit duh!)

Any one of you knowledgable people help please? I have looked at the wiring diagram but can't work it out and see blue wires going to both!

[zed1015]

Without a diagram but going from the direction of the wires i'd say B and E go to D and C goes to A.

[Grog]

Hello mate;

Wiring - gotta love it! Z900A4 not my model, but I have had a look at the wiring diagram, and looks like the blue from the LH switches (E) should connect to the blue female (A). This looks to be marked as the dimmer switch circuit; can you see if the loom wire has a resistor a little further along? This would confirm if so. EDIT - if the bike is a US model, looks like there's no resistor present.

Now it gets a bit awkward - there's no sign of blue wiring on the RH switches although there is a blue-white related to the lighting circuit on the US/Canadian version, and also the Z1000 switchgear. Any chance you've got an import/non-original RH switch?

TTFN Grog

[thewormman]

Hello mate;

Now it gets a bit awkward - there's no sign of blue wiring on the RH switches although there is a blue-white related to the lighting circuit on the US/Canadian version, and also the Z1000 switchgear. Any chance you've got an import/non-original RH switch?

TTFN Grog

Thanks The RH switchgear came from Z power its a repro part as is the loom, so would expect it to be Euro version?

[Grog]

Hello mate;

Agree it should be the Euro version, but that doesn't particularly help if the wire colours that have been used aren't the originals (and it looks like they aren't). The blu-white from the loom (B) is also part of the lighting circuit and looks like it takes the feed from the headlight switch for the parking light circuit,so that's a start.

Can you split the RH switchgear and run a continuity check from the headlight switch to see if it feeds wire D? Alternatively, if you have power to the switches turn the headlight switch to Park, then full On while checking for output at wires C and D each time. This should give you some idea what each of those wires is outputting.

It's a faff, but it's going to be a bit of trial and error to find what's connected to what. Happy hunting!

TTFN Grog

[thewormman]

UPDATE: for if anyone has the same problem and searches later.

E to A and D to B

C isn't used. This has worked for my setup.

Thanks for your thoughts