74 TX650 Wiring loom Plug Questions.

Hey,

I picked up a 1974 TX650A, I believe it is, There's two plugs up near the front of the loom on the bike, one goes through to the inside of the headlight shroud, and the other hangs out down near the coils, the one in the headlight has 6 wires and the one near the coils has 5. I can't find these connectors anywhere in my wiring diagram, but what I have found is between them there's only three wire colours common to the diagram, that being Brown, the main power for the indicators and such, Black, earth, and one sky blue wire, which my diagram says should run down to the neutral light, but it's only in this plug.

I can't find where the wires run to but one, which I think runs down to the brake lining checker. Any idea's what they're for? They seem to be common to the loom if ebay listings of other looms are anything to go by. Everything works that needs to but the neutral light. Indicators, tail lights, headlight, electric start. I've been over the entire electrical system at least twice now, I don't remember seeing those wires anywhere, and I also can't find any information on them either, I can take photo's tomorrow as I'd imagine they'd be very helpful.

thanks.

Here's the images, took me a while, no idea what these are for. Thanks.

The 5 wire plug near the coil probably goes to the turn signal cancelling unit. It doesn't really affect anything if the cancelling unit is missing and this plug is left unplugged.

The 6 wire plug up front goes into the headlight shell where it connects to a plug from the dashboard that also goes into the shell. It powers various indicator lights. The brake lining checker might be one. The neutral light gets a keyed hot (brown) going to it, then the sky blue goes to the neutral switch in the engine case where it grounds when bike is in neutral, completing the circuit.

Hey,

thanks for that, a fair bit of stuff was missing when I got the bike and we've had to make a dash, thank christ because the Stock one for this model wouldn't look out of place in a russian tractor. I found the sky blue for the neutral light, it's connected and working, I'm not worrying about the brake lining light, and there's no plug on my brake insert anyway, the cancel, yeah, none of that.

Thanks for the piece of mind. I figured they mustn't do much because the bike runs and everything that needs to work, works, but it's always good to ask.

It just had me confused because almost none of the wires in those plugs are on the wiring diagram I have.

Thanks.

Looked through all my older bikes, parts boxes, and harnesses and found nothing that fit the plug near the coils, maybe something goes there in non USA markets? will look at the 6 wire plug in the headlight shell on my 75's tomorrow.

I have an Oceania 74TXA and those couplings are on my bike as well. Have the gauges off so can't comment on the 6 wire plug

The 74TXA wiring diagram floating around on this site is not any good for our bikes. Oceania models have a reserve lighting unit, a
passing button on the left hand switch and a park light in the headlight shell, nun of these are on the wiring diagram. The 75B/76C wiring diagram is closer to out 74TXA but is still missing the Pass switch and park light. The R/G wire is on the schedule but i cant see it on the wiring diagram

650Skull said:

I have an Oceania 74TXA and those couplings are on my bike as well. Have the gauges off so can't comment on the 6 wire plug

The 74TXA wiring diagram floating around on this site is not any good for our bikes. Oceania models have a reserve lighting unit, a
passing button on the left hand switch and a park light in the headlight shell, nun of these are on the wiring diagram. The 75B/76C wiring diagram is closer to out 74TXA but is still missing the Pass switch and park light. The R/G wire is on the schedule but i cant see it on the wiring diagram

Click to expand...

Oh damn, well that explains that, I hope it's not going to need all that crap for a road worthy, I mean, it's got the important stuff (Indicators, lights, etc)

The 75 gauges use that 6 wire plug in the headlight. I think the 74's were the same.

Yea but the Oceania bikes have 6 wires in that plug where the US ones have 3.

I have bought a couple of 74/75 Gauge clusters from the States, (unbeknown to me at the time about the wiring/pass switch/reserve lighting/park light), and the 3 wires in the 6 wire coupling. (US), still line up with the 3 wires in the 6 wire coupling, (oceania), having 6 wires in the coupling...........make sense...........Pics may help

Thanks for the lead to the other thread. tHINK I'm GOOD.

On the one plug by the coil, it may be for a self canceler but the US bikes didn't come with one. Only the later bikes did.
They may have put one on bikes meant for other places.
Leo

The further I go the more behind I get. The numbers said it was a 1975. And it wasn't running and a lot of parts in a box. So as I get down to the final, I find that the instruments are not from a 1975. Also, what a thrill to find that the tank is a 1979 or '80 with the offset fuel cap and vacuum petcocks. Found this out when I tried to rebuild the petcocks with the wrong kit, but worse, when I went to put on the 1975 tank graphics. So I am slowly going thru the wiring. Thanks again for the input. I have been watching Forum for a while, and have gotten a lot of good info from the tech section.

Offset gas cap is a Special tank. Two petcocks (vacuum) would be '78 or '79. One petcock (vacuum) would be '80 or later.