Thanks for the picture. I will have to buy the hardware to do the test. Many years ago I installed an oil pump on a 350 chevy that was on the table. I can assume that this wouldn't be a piece of cake for a first timer. Thanks

 

If your Caravan had a B or RB with an external oil pump, it would be much easier the the V-6 gerotor pump mounted inside the timing chain cover (behind the passenger motor mount, etc.)

Assuming the oil pressure switch is inexpensive, by the time you find and hook up a direct reading gauge, you probably be head in time and dollars switching out the switch.

But I agree, get a known, good direct reading (mechanical) gauge and verify the pressure. But since a turnoff and restart causes the light to turn off and you don't have any lifter noise (do you?), it probably is the switch - unless the PCM/ECM/? processes the signal?

 

I don't care for anyone that recommends to just replace a part until proper testing is done. This is a horrible way to fix things... some times you get lucky and sometimes you dont... but it's the don't part that ends up costing more money, more frustration, more hissy fits on forum boards. 'Do it right, Do it ONCE!!!"

 

Very true, any problem should be diagnosed/tested as much as possible before parts are thrown at it.

Some diagnostic work doesn't require test tools - only an aware owner that takes accurate notes (does it do it hot or cold, coasting or acelerating, turing with or without braking etc.) and can technicaly explain the sysmptoms with more than "It doesn't work". Having owned two similar cars (a 1968 and 1970 Austin America), it was cheap to swap the electircal parts from one car to the other to verify the problem was the sending unit or an internal engine issue (oil pump, pressure relief valve, bearings, faulty oil filter by-pass valve, etc.).