Author Topic: Coolant expansion tank sensor 2 pin connector  (Read 320 times)

Offline metalblue

  • Members
  • *****
  • Posts: 41
Coolant expansion tank sensor 2 pin connector
« on: September 27, 2021, 11:50:09 pm »
Desperately seeking, if it has some cable already attached would be even better  :)

Looked on heritage parts and couldn’t find the right plug, and nothing on eBay that I can see… you’d think they’d be a 10 a penny

It’s got the 2 raised slots on it (the one on heritage only has 1 in the middle), sorry can’t seem to post pictures.

Thanks all

Offline hayesey

  • Administrators
  • *****
  • Posts: 5768
  • The CV joint killer
    • ClubG40
Re: Coolant expansion tank sensor 2 pin connector
« Reply #1 on: October 01, 2021, 09:27:22 am »
They are junior power timer (jpt) connectors but as you say most 2-pin ones only have the one locating slot in them. I have managed to find somewhere with the two slot version:

https://e-connectors.pl/pl/p/357972752/2586

Not sure if the spacing is right but there is a diagram on there. Need to see if I can find it on Farnell or anywhere else.

What is actually wrong with yours? Is the plastic shell itself damaged?

Offline hayesey

  • Administrators
  • *****
  • Posts: 5768
  • The CV joint killer
    • ClubG40
Re: Coolant expansion tank sensor 2 pin connector
« Reply #2 on: October 01, 2021, 09:29:25 am »
searching for this number on amazon brings results: 357972752

Offline hayesey

  • Administrators
  • *****
  • Posts: 5768
  • The CV joint killer
    • ClubG40
Re: Coolant expansion tank sensor 2 pin connector
« Reply #3 on: October 01, 2021, 09:30:36 am »
oh this might be it, need to check the width of the connector though as from memory it seems narrow for the header tank connector:

https://www.ebay.co.uk/itm/174023107786?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338365712&toolid=20006&customid=EB21104498&


Offline metalblue

  • Members
  • *****
  • Posts: 41
Re: Coolant expansion tank sensor 2 pin connector
« Reply #4 on: October 02, 2021, 03:32:07 pm »
Thanks mate.  Unfortunately you are correct the spacing isn’t right.   Hopefully I’ve managed to resize the image so it’ll load nowadays an attachment.   I can’t figure out how to unlock this particular connecter, normally you should be able to slide the locker over but I’m fudged if I can figure it out with this one!!

Offline metalblue

  • Members
  • *****
  • Posts: 41
Re: Coolant expansion tank sensor 2 pin connector
« Reply #5 on: October 02, 2021, 03:33:18 pm »
Try again


Offline Andy

  • Traders
  • *****
  • Posts: 1502
Re: Coolant expansion tank sensor 2 pin connector
« Reply #7 on: October 04, 2021, 04:32:26 pm »
Scratch that, Delphi/Aptiv I think have the OE tooling.

Check the datasheet on this for dimensions:
https://uk.rs-online.com/web/p/automotive-connectors/8961815/

Offline metalblue

  • Members
  • *****
  • Posts: 41
Re: Coolant expansion tank sensor 2 pin connector
« Reply #8 on: October 07, 2021, 10:27:56 pm »
Thanks Andy. 

I managed to find this

https://www.ebay.co.uk/itm/Horn-2-Pin-Connector-Pre-Wired-For-Audi-Seat-Skoda-VW-01450173-01450185-/274813417324?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0

Which is very close but not exactly the same, going to see if I can make it work (image attached)


Offline metalblue

  • Members
  • *****
  • Posts: 41
Re: Coolant expansion tank sensor 2 pin connector
« Reply #9 on: October 11, 2021, 05:40:51 pm »
That did fit.   Still getting the low fluid/pressure warning light though.   

Next port of call.   Wires where a bit thicker so maybe too much resistance now to expansion tank sensor? Presume I can just short across the two wires to check this?  I’m not convinced it’s pressurising the system though either, will take another look tomorrow.    Coolant either shows 0 or if it does move it never goes to more than 70 (was doing this before I changed the plug as well but when I saw the plug was u/s I figured was the cause), if I short across the temp sensor it goes to top so not a u/s gauge.  Running larger intercooler.   I’ve seen other owners have similar issues in the past but not found the cure yet  ;D

Offline hayesey

  • Administrators
  • *****
  • Posts: 5768
  • The CV joint killer
    • ClubG40
Re: Coolant expansion tank sensor 2 pin connector
« Reply #10 on: October 20, 2021, 09:17:33 am »
I suspect there'll be a break in the wire somewhere between the connector and the dash clocks, goes via the plugs on the back of the fuse box. The break will most likely be on the engine side since that's where the wires go through heat cycles and get brittle and break.

Offline PeteG40

  • Administrators
  • *****
  • Posts: 4026
  • Housewives heart throb
Re: Coolant expansion tank sensor 2 pin connector
« Reply #11 on: October 21, 2021, 07:44:39 am »
the coolant tank does not work the temp gauge - only flashes if the level is too low. (short the wires and the light goes out)

the gauge runs from the black temp sender on the thermostat housing. (short the wires and the gauge goes to the top)

Offline hayesey

  • Administrators
  • *****
  • Posts: 5768
  • The CV joint killer
    • ClubG40
Re: Coolant expansion tank sensor 2 pin connector
« Reply #12 on: October 22, 2021, 11:51:09 am »
yeah I missed that part, the connector on the header tank is nothing to do with the temperature gauge it's simply a fluid level "sensor", it just forms a circuit in presence of coolant and no circuit if no coolant is present at that point in the header tank.