Oil pressure sender - dead?

[lkadams]

Getting my 1969 911E motor with Webers sorted out here. When I turn on the ignition key, the oil pressure gauge pegs to the top. I check the grounds on it and all seems to be well. If I take the lead off the sender in the engine compartment and ground it, it goes back to the bottom.

Is this a sign the sender is dead? Is there any way to "revive" a sender?

Thanks,
Keith

[edmayo]

What happens if you ground the wire to the sender body? That will tell you if the sender is grounded to the case.

[304065]

Internal sender failure- fortunately for you the -69 sender is cheaper than the SWB version.

[lkadams]

I took the sender out and played with a bit with no resolution.

Ed - continuity between sender body and ground, no continuity between contact and body, so it appears to have failed "open". In a way that's reassuring though, as adding all this to a 912 that never had it, I was worried the wiring was at fault.

John - I did initally balk at the $150 for the replacement for an OE Porsche from Pelican, but based on a post over there, I see the generic VDO part is more commonly available for $30. My local VW shop will have one.

Thanks guys!

[lkadams]

Replaced the sender with the VDO two terminal generic replacement from the local VW shop. Seemingly, the terminals aren't differentiated between warning light and gauge, so I had a 50% chance of getting it right on the first try (I didn't) but we are back to a functioning gague again. The gauge they had on hand seems to have the tapered threads instead of the M10 straight threads (even though it is listed as the VDO 360-023 model). Or maybe just a tighter fit? At any rate, holds oil!

[edmayo]

The terminals should have been marked WK and G if memory serves me. WK being warning light and G being gauge. But as you say you're bound to get it right!!