My oil level warning light has come up in my Mondial 3200 The oil level is OK The wires are connected to the dipstick I have tried short circuiting but it stays on Cannot find details in the wiring diagrams Should there be a specific resistance between the connections on the dipstick that I can measure This way I can be make the dipstick sensor is OK Thanks for helping
The circuit below represents the circuitry for the oil sensor, connectors, and oil warning light of a 1980 308 GTB/GTS, NOT a Mondial...but...it should match your car. The indicator lamp (16) is connected to 12v battery when key is on, the oil pressure switch (15) grounds when oil level is critically low. If your indicator is lite in error, the switch could be bad, improperly installed, or a wire going to the switch has shorted. To prove the wiring is ok, (assuming you can locate the switch) disconnecting the single connector should cause it to go out. If the light stays lit with switch connector off, you have a wire inappropriately touching ground someplace. Incidentally (1), many individual circuit function drawings from my 308 drawing pack are helpful with the Mondial cars but the large full car drawings are not included. Hope this helps. Incidentally (2), if anyone ever finds a location chart pinpointing where the connectors are within the car, please let me know...that information would be tremendously helpful. I'd like half day access to a car being parted out to document them. __________________________ http://www.ferrari308gtbi.com/ Image Unavailable, Please Login
Thanks Paul I do not think the 308 has got the same type of oil level sensor in the dipstick Your diagram is not like in my car I measured the resistance of the sensor in and out of oil (not in the car) It is about 12 to 15 Ohms (my multimeter is not very accurate) But it is not changing I read in an old thread it should be 12 Ohms when in oil
Anything new discovered in this thread? My '83 Mondial QV has a false 'low oil' warning on the Check Control. The warning lamp is on independent of whether the sensor is in or out of oil, sensor connected or disconnected. I have been unwilling to short the sensor contacts because the Mondial's electrical system is already fragile. Perhaps I should connect a resistor across the leads for a quick test? Anyone else made any progress in understanding this circuit? Most Check Control systems, for example BMWs, measure the current drawn by the circuit. That's how they detect burned-out lamps, as the affected circuit draws low (or no) current. One could use a similar circuit for the oil level where the sensor, when low, would open. Otherwise, it might connect across a known load; say 12 ohms, as indicated earlier. I guess I just need to find a spare Check Control panel and related equipment and ferrit-out the operating principles. If someone has an operating sensor and will measure the resistance across the contacts WHEN IN OIL, I would greatly appreciate it and will report back my findings. All help appreciated! - rick in Houston
11 ohms on dipstick light goes out Open it comes on You might have a loose wire or bad connection somewhere--Not that those are uncommon on a Mondial.
Absolutely brilliant. My dipstick sensor reads 'open' under all conditions. Time for a stop at Radio Shack... Thanks! You rock! -rick / Mondial QV / 308GTB
