Tatguy Posted January 28, 2019 Report Share Posted January 28, 2019 (edited) Ok i have a 2 and a quarter landrover series 2a When i turn on ignition the oil pressure gauge goes full even without engine running When i start the engine it remains full Any ideas? Edited January 28, 2019 by Tatguy Link to comment Share on other sites More sharing options...
bizzard Posted January 28, 2019 Report Share Posted January 28, 2019 (edited) 4 minutes ago, Tatguy said: Ok i have a 2 and a quarter landrover series 2a When i turn on ignition the oil pressure gauge goes full even without engine running When i start the engine it remains full Any ideas? Sender on the engine knackered I reckon. Pull the wire off it and see if the gauge needle drops. The sender should be on the oil filter housing. Although an oil pressure gauge wasn't, I don't think standard on a 2A just a light. It might be an capillary tube pressure gauge type, Edited January 28, 2019 by bizzard Link to comment Share on other sites More sharing options...
Chewbacka Posted January 28, 2019 Report Share Posted January 28, 2019 9 minutes ago, bizzard said: Sender on the engine knackered I reckon. Pull the wire off it and see if the gauge needle drops. The sender should be on the oil filter housing. Although an oil pressure gauge wasn't, I don't think standard on a 2A just a light. It might be an capillary tube pressure gauge type, Possibly a bad earth if an electrical gauge. Link to comment Share on other sites More sharing options...
bizzard Posted January 28, 2019 Report Share Posted January 28, 2019 (edited) 2 minutes ago, Chewbacka said: Possibly a bad earth if an electrical gauge. Thats what I mean. The sender has failed permanently to earth. But it might have the non electric capillary tube type Edited January 28, 2019 by bizzard Link to comment Share on other sites More sharing options...
Chris Williams Posted January 28, 2019 Report Share Posted January 28, 2019 The oil gauge on 'Jaguar' showed a re-assuring 25 lbs. Whether the engine was running or not. It wasn't even connected. There was one on the engine itself which did work. Link to comment Share on other sites More sharing options...
Tatguy Posted January 28, 2019 Author Report Share Posted January 28, 2019 (edited) It only drops down if i touch wire from switch to earth Other than that nothing happens Its on constant weather there is wire on switch or not Edited January 28, 2019 by Tatguy Link to comment Share on other sites More sharing options...
bizzard Posted January 28, 2019 Report Share Posted January 28, 2019 2 minutes ago, Tatguy said: It only drops down if i touch wire from switch to earth Other than that nothing happens Its on constant weather there is wire on switch or not Are there two wires on the switch ?, there would normally be if its working a gauge and not a light and touching earth with the neg- wire on it would make the gauge needle drop. Still sender switch fault I reckon, stuck at high pressure. Link to comment Share on other sites More sharing options...
jonathanA Posted January 28, 2019 Report Share Posted January 28, 2019 (edited) Odd that it’s permanently on. Would have thought the +ve would be supplied from an ignition supply. Has it always been on ? Has something changed recently ? ETA sorry mis read post you say it’s ignition controlled (doh) as others say got to be sender then . Edited January 28, 2019 by jonathanA Missed post info Link to comment Share on other sites More sharing options...
bizzard Posted January 28, 2019 Report Share Posted January 28, 2019 4 minutes ago, jonathanA said: Odd that it’s permanently on. Would have thought the +ve would be supplied from an ignition supply. Has it always been on ? Has something changed recently ? This is it, an oil pressure gauge wasn't standard fitting on a 2A but one of the great many approved after market extras available for L/R's. So we don't know who or how it was wired the pos+ might come straight off the battery or wired to the live side of the fuse box or something. Link to comment Share on other sites More sharing options...
jonathanA Posted January 28, 2019 Report Share Posted January 28, 2019 I think you made the same mistake as me the ops post #1 and #6 are slightly contradictory. But on rereading I took 6 to mean the pressure gauge shows max all the time (the ign is on) earthing the sender lead means the wiring is sound as the gauge reading drops. Link to comment Share on other sites More sharing options...
bizzard Posted January 28, 2019 Report Share Posted January 28, 2019 35 minutes ago, jonathanA said: I think you made the same mistake as me the ops post #1 and #6 are slightly contradictory. But on rereading I took 6 to mean the pressure gauge shows max all the time (the ign is on) earthing the sender lead means the wiring is sound as the gauge reading drops. I see what you mean. A sender for a gauge would be the larger variable pressure type with one or two terminals. A sender for a light is just basically an on/off switch and much smaller. The one with two terminals would also work a warning light at the same time using the lights earth neg- for its earth. On either type the pos+ feed should as you say be wired to the ignition switch or a junction box, live only when ignition its switched on. Link to comment Share on other sites More sharing options...
Tony Brooks Posted January 29, 2019 Report Share Posted January 29, 2019 A typical bi-coil gauge, be it fuel, pressure or temperature, has three terminal on the back, one being a n earth *negative). The needle is held between two coils. The one going to the sender has a variable magnetic strength depending upon the sender while the other that is fed to earth has a fixed magnetic strength. If, as someone said above, the earth on the gauge fails the unit may read full all the time the ignition is on. Link to comment Share on other sites More sharing options...
Chris Williams Posted January 29, 2019 Report Share Posted January 29, 2019 Another unreliable electric gizmo replacing a simple mechanical item - capillary tube. My friend had her electric window fail - no winding handle. Link to comment Share on other sites More sharing options...
WotEver Posted January 29, 2019 Report Share Posted January 29, 2019 28 minutes ago, Chris Williams said: Another unreliable electric gizmo replacing a simple mechanical item - capillary tube. My friend had her electric window fail - no winding handle. Yeah, we had our vacuum cleaner break. It was a hell of a job getting the fitted carpet up so we could beat it over the washing line... Link to comment Share on other sites More sharing options...
ditchcrawler Posted January 29, 2019 Report Share Posted January 29, 2019 if its like my old 2 1/4 I would go for mice behind the instrument panel Link to comment Share on other sites More sharing options...
Chris Williams Posted January 29, 2019 Report Share Posted January 29, 2019 5 hours ago, WotEver said: Yeah, we had our vacuum cleaner break. It was a hell of a job getting the fitted carpet up so we could beat it over the washing line... You should get one of these: Link to comment Share on other sites More sharing options...
Tatguy Posted January 31, 2019 Author Report Share Posted January 31, 2019 Got it sorted now thanks it was the gauge Tat Link to comment Share on other sites More sharing options...
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