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86 BRAT OIL PRESS (NOT ENOUGH WIRES?)


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2 replies to this topic

#1 TIMBERTIGER

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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? 

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#2 charles_thomas

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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

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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.

 

GD


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





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