is there a relay for oil pressure ?

[peter8315]

as per title, i keep losing my oil pressure light, no power to oil pressure switch, it will be ok for a bit then disapear

 

[tomcat59alan]

Bad contact?

 

[peter8315]

wich contact??, i have tested feed wire to oil pressure switch and its dead

 

[tomcat59alan]

wich contact??, i have tested feed wire to oil pressure switch and its dead

Well I would be looking at the gauge end then. The switch is a variable earth (from memory) so there is an intermittent supply to/ from the gauge.

 

[peter8315]

when you say switch, do you mean relay switch, if so my origanal question was , is there a relay on the oil pressure,

 

[tomcat59alan]

when you say switch, do you mean relay switch, if so my origanal question was , is there a relay on the oil pressure,

Oil pressure switch.

 

[peter8315]

fitted new lucas pressure switch today,and the way i understood it is that 12v feed to switch and earthed = oil light on. oil pressure rises as engine starts and switch cut feed = oil light goes off, please correct me if this is wrong

 

[Saint.V8]

What year and engine?

 

[peter8315]

1986 200tdi

 

[Saint.V8]

Ahh....I have wiring diagrams back to 1987....but the 200TDi engine wasn't around in 1986........where is the engine originally from?

I am sure there isn't one mind!

 

[tomcat59alan]

fitted new lucas pressure switch today,and the way i understood it is that 12v feed to switch and earthed = oil light on. oil pressure rises as engine starts and switch cut feed = oil light goes off, please correct me if this is wrong

Sorry thinking of the pressure gauge switch, you are correct so I would be checking where the 12v supply comes from. I'm struggling with a new wiring loom for the E type at the moment hence the mix up. Start by trying to get a wiring diagram for your motor

 

[peter8315]

looks like i will have to wire a different set up in, i will run a new feed off the ignition through a bulb + holder set it dash down to oil pressure switch, this does work as i have tried it before, i looked in a workshop manual today and it seems there isn't a relay for it

 

[Datatek]

looks like i will have to wire a different set up in, i will run a new feed off the ignition through a bulb + holder set it dash down to oil pressure switch, this does work as i have tried it before, i looked in a workshop manual today and it seems there isn't a relay for it

That should be fine, not seen a relay in a normal oil pressure circuit.
Consider an LED for the lamp, less load on the switch

 

[peter8315]

good thinking datatec