Engine No Oil Pressure…where to start?

[1979GabeCJ5]

Hello all,
I have CJ5 with the AMC 304 in it. I just got it running and I have no oil pressure at the gauge.

The gauge: Original gauge with 3 posts and a hole for a light. How do I test the gauge?

The pressure sending unit has one wire coming off and I’ve checked for continuity from where it attaches to sending into to where it attaches to gauge.

Where do I start with diagnosing?

 

[CJ]

The first thing and the most difficult is hook up a mechanical gauge.
I know that is hard but it is necessary. Don't trust your engine via a bad gauge.

 

[1979GabeCJ5]

The first thing and the most difficult is hook up a mechanical gauge.
I know that is hard but it is necessary. Don't trust your engine via a bad gauge.

Thanks for the speedy response, would you have a link for the correct one/a moderately priced one?

 

[CJ]

Any any auto store will have a kit for just a few bucks...

 

[jzak]

Ditto with CJ. I don't trust anything other than mechanical Oil gauges. Most auto part stores you can pick one up for like $10-15 bucks, and it's really not that hard to install. Maybe 1 hour. On the AMC 258 i6 / 4.2l , there's a block port you can hook it up too next to the oil filter.