Rewiring a 10 pin two connector turn signal switch

[CroissantBandit]

I think my odds are finding this 10 pin connector are pretty low. Does anyone have any experience rewiring a more common 9-pin to do the trick? I did just post an ad on the classifieds, hoping I get lucky. I haven't looked at a wiring diagram yet but the nine pin is missing a whole plug ... Sounds out of my comfort zone.

[datzenmike]

The '73-'74 were 8 pin, the '75-'77 were 7 pin, the '78 was 10 pin and the '79 were 10 pin plus a two pin plug for the 'flash to pass' high beam switch.

 

My head hurts thinking about it. You might get a '78 switch working but the 'flash to pass' probably wouldn't work.

[Stoffregen Motorsports]

There are companies that specialize on Japanese wiring connectors. Here's one of them - https://cycleterminal.com/

 

Here's another - https://www.vintageconnections.com/collections/connectors

[ggzilla]

The "trick" 2nd connector is for the passing switch. 

17 hours ago, CroissantBandit said:

Does anyone have any experience rewiring a more common 9-pin to do the trick?

So it's not a matter of rewiring. You would have to add a switch in there

 

turn signal lever with built-in "flash to pass" switch

[Dguy210]

On 4/3/2025 at 7:26 PM, CroissantBandit said:

I think my odds are finding this 10 pin connector are pretty low. Does anyone have any experience rewiring a more common 9-pin to do the trick? I did just post an ad on the classifieds, hoping I get lucky. I haven't looked at a wiring diagram yet but the nine pin is missing a whole plug ... Sounds out of my comfort zone.

 

That 10 pin looks very close to a molex style connector. 

Odd as it sounds I think you might be able to modify a PC power supply molex connector  (24 pin or similar or to 4 pins etc.) to work. They use a very similar pin layout in two rows of about that size. Wouldn't be 100% perfect but probably quite workable.

 

IF needing both ends you could also depin the male/female on both sides and swap out for new more easily obtainable bodies with the same pins.

Edited April 5, 2025 by Dguy210

[Stoffregen Motorsports]

The most comprehensive website I can think of for connectors is Mouser Electronics, but holy cow, patience is key. You have to pore over thousands of small parts with small pics and sometimes very little info. It helps to know the trade name of that connector, like Delphi, Aptiv, TE, Molex, AMphenol, Deutsch, Metripack, etc

 

Mouser lists 41,307 different "automotive" connectors. https://www.mouser.com/c/connectors/automotive-connectors/

[ggzilla]

Just clean up those pins with contact cleaner. The connector otherwise looks fine

 

Alternatively, jigger those pins out of the connector and replace the bad bins, while keeping the connector

[Stoffregen Motorsports]

This is the closest I could find. Same style and shape and same pins, but only 6 pin - https://www.vintageconnections.com/products/yamaha-control-connector

[Dguy210]

On 4/5/2025 at 10:21 AM, Stoffregen Motorsports said:

This is the closest I could find. Same style and shape and same pins, but only 6 pin - https://www.vintageconnections.com/products/yamaha-control-connector

This is why I said molex connector, found in basically every PC made these days and available as cables very cheaply in a variety of pin numbers. 4 being common for power and 10 to 24 for PC power supply connectors. 

 

Or you could do what my local flavor insanity says to do and make your own connectors and just buy pins (I'll save you having to see all the photos my 3D printed connectors).

 

[Stoffregen Motorsports]

I get what you're saying, but it isn't a Molex connector. The pins look like Molex though.

[Dguy210]

Well this is interesting, look what I found with an image search:

 

I wonder if this is a more common JDM style connector we just don't have the search terms for.

 

https://ecooparts.com/en/used-auto-part/mitsubishi/montero-l040/30131262_-tr7901-mitsubishi-montero-l040-2500-td.html

 

"Multifunction Switch MITSUBISHI MONTERO (L040) 2500 TD TR7901 Q79QC79 176850"

[ggzilla]

Nice find. That Montero connector look like it might work. There's a 1998 Montero at pick-n-pull Arlington

 

[donjuanit0]

On 4/3/2025 at 7:26 PM, CroissantBandit said:

I think my odds are finding this 10 pin connector are pretty low. Does anyone have any experience rewiring a more common 9-pin to do the trick? I did just post an ad on the classifieds, hoping I get lucky. I haven't looked at a wiring diagram yet but the nine pin is missing a whole plug ... Sounds out of my comfort zone.

Did you find a work around? I am having the same issue.