I installed my motor and the oil pressure gauge is not working. Its b/c i dont have one of the two wires hooked up. I have the wire that goes to the unit hooked up, can anyone tell me where the other one goes???

 

I believe it is a ground if i'm not mistaken but if I'm wrong i'm sure someone will tell me

 

So could i just ground it somewhere?? B/c there is no place for it on the transmission

 

a ground is a ground brotha, either way its negative

ground that ho!

 

i grounded it and still there is no oil pressure??? i am really confused.

 

maybe a bad sending unit. Do you have a manuel pressure gauge???

 

I think its electric b/c there is the two wires

 

no I mean do you have manual pressure gauge so you can test your oil pressure to make sure that it really doesn't have 0 psi of oil. Also was this gauge working before???

 

The OEM oil pressure sender only has one wire going to it- it grounds through its threads on the side housing.

So, make sure your engine grounds (bonding jumper at the tranny-firewall) are good, and make sure your sender threads are nice & clean (no teflon tape wrapped around them)...

On S4 cars, the sender wire is yellow/red...

Also make sure the capacitor (bolts to the clutch slave cylinder for its ground) wiring is not shorting to ground...

 

i dont have a capacitor, i had everything rebuilt and they forgot to put it back on the transmission. My oil gauge worked before so i dont think it is bad.