oil pressure gauge goess off the scale?! help!

[Sleeper_Avant]

Dave, its on a non 5-cylnder, its a 4 cylnder 6a Sorry!

So again, joining the 2 wires with send the gauge to 0bar ?

[UrS4boy]

after a bit of google action, the big 2 pin sender and the single pin sensor BOTH feed the gauge? this correct? also if i join the 2 contacts up from the big one it should read 0 bar?

The oil pressure gauge sender, F22, has two wires attached to it. Both are powered and ground through the F22. The F22 has both a gauge sender and a pressure switch inside. The pressure switch is 0.3 Bar and, on an AAN harness, the wire is Blue with a black stripe. The other wire is Black with white stripe and goes to the pressure gauge. If I remember correctly the harness either has different sized spade connectors or different sized ring terminals so you can't F it up too bad (only 50% bad).

The other pressure switch (the one that will die and p*ss oil everywhere), the F1 switch, is on a White/Grey wire on the AAN.

All three go to ground when they are active.

[Error404]

you have no connection to the WK post on the oil pressure sender

[Monkeymagic]

possible one of the wires is shorting to ground giving full deflection

[AndyP]

I'm sure only the big 2 pin sensor feeds the gauge, the single pin sensor is just for the autocheck low oil pressure warning.

[Sleeper_Avant]

after a bit of google action,

the big 2 pin sender and the single pin sensor BOTH feed the gauge? this correct?

also if i join the 2 contacts up from the big one it should read 0 bar?

[UrS4boy]

If I remember correctly, when the oil pressure gauge goes off scale, it means that there is no signal to it, i.e. kind of a warning. Hence no difference when you unplugged it. Broken wire or broken sender.

[Sleeper_Avant]

oil pressure gauge on my B4 goes right off the scale as soon as the ignition is on, any temperature and running or not.

pulled both wires off the sender with no difference?

anyone got any ideas?

also fitted new gauges today with no change, they have been "retrofitted" by the looks of it, any wiring diagrams etc?

not helped by "search function" or S2Central

cheers

Sean.