oil and temp sensor

[Mike]

Anyone know how to test whether its the gauge or sensor.

71 351c 2v

 

[TheRktmn]

- Disconnect wire from sending unit, momentarily connect wire to ground (preferably through a 10 ohm resistor). Gauge should swing to full scale.

-- if gauge moves then sender is at fault. Check that the sending unit case is grounded with little to no resistance, replace sender if necessary. *It is common for replacement senders to be either the wrong value or wrong type. Always buy senders from a reputable supplier and double check the part number if possible.

-- If gauge does not move: check voltage at both sides of gauge, perform grounding test at output side of gauge (post not coming from IVR), check wiring circuit from gauge to sender.

Full story here: http://www.classiccougargarage.net/showthread.php?tid=186&pid=1217#pid1217

 

[73Vert302]

Mike-you may be able to find your answer if you do a search-just put a few keywords in. I have seen this topic discussed many times in the short time I have been a forum member.

 

[Don C]

A common mistake people make is to use Teflon tape on sensor threads, which may insulate them from the engine, preventing a ground. Check yours to make sure tape wasn't used. Use something like Permatex 565 or 592 thread sealant on most sensors.