Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -


  • Please log in to reply
2 replies to this topic



    USMB Regular

  • Members
  • PipPipPip
  • 110 posts
  • Pensacola, FL

Posted 14 November 2017 - 12:04 PM

I have an 86 BRAT GL EA81 car and I have rebuilt the the oil pump and purchased a new oil press sending unit. Prior to the rebuild my oil pressure gauge would stay pegged out. After the change, The needle barely moves up at all and doesn't even reach the numbers so i suspect the new sending unit to be faulty. 


After installing the pump i noticed i have a pressure switch for a dummy light as well as a sending unit for pressure reading but i only have one wire. Where is the wire i am supposed to connect to the pressure switch? 

Attached Files

#2 charles_thomas


    New User

  • Members
  • PipPipPip
  • 42 posts
  • Sandpoint, ID

Posted 14 November 2017 - 12:41 PM

Of the ones I have seen, (others I am sure will chime in shortly) it is one or the other. Even the few later models with a gauge and light, only had one sender, and the light was ran off of the gauge.
Fastest toubleshoot is to simply re-install the original unit, and see if the gauge reacts.
If it does not, I would move to checking for proper ground, and weather the sending unit is using the correct resistance. (Found by either testing, or simply googling the unit numbers to check listed application)

Edited by charles_thomas, 14 November 2017 - 12:41 PM.

#3 GeneralDisorder


    Elite Master of the Subaru

  • Members
  • 21,396 posts
  • Portland

Posted 14 November 2017 - 02:49 PM

1. It doesn't have it. Your engine isn't original and came from a car with a dummy light. Simple as that. 


2. Get the sending unit from Subaru. Aftermarket are crap, don't work, and may dump all your oil out on the ground. If that happens see #1.



Edited by GeneralDisorder, 14 November 2017 - 02:50 PM.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users