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rotorwrench · 08-17-2012, 06:45 AM

[QUOTE=Rand;480756]How can a guy test them to see if its accurate or not?

You can test any temperature monitor system if you have a hot plate, a pan of oil (oil won't boil over like water but I use synthetic oil that won't catch fire either), an accurate thermometer, and some jumper leads to connect the system to temp senders strategically suspended in the pan of oil on the hot plate. Ground paths have to be observed too so I usually use a partially insulated copper wire to wrap around the sender to suspend it in the pan. The wire must be insulated from the pan and have a way to connect to it and then connect back to the ground path on the vehicle.

If your thermometer or pyrometer to check the hot oil temp is accurate, you can see how far off the vehicles temperature indication is from the actual temp of the test media. You can also test the temp sensitive switch that the later vehicles use this way. You will know exactly what temp the switch opens at.

08-17-2012, 06:45 AM	#13
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 17,409	Re: Temperature sender: one or two? [QUOTE=Rand;480756]How can a guy test them to see if its accurate or not? You can test any temperature monitor system if you have a hot plate, a pan of oil (oil won't boil over like water but I use synthetic oil that won't catch fire either), an accurate thermometer, and some jumper leads to connect the system to temp senders strategically suspended in the pan of oil on the hot plate. Ground paths have to be observed too so I usually use a partially insulated copper wire to wrap around the sender to suspend it in the pan. The wire must be insulated from the pan and have a way to connect to it and then connect back to the ground path on the vehicle. If your thermometer or pyrometer to check the hot oil temp is accurate, you can see how far off the vehicles temperature indication is from the actual temp of the test media. You can also test the temp sensitive switch that the later vehicles use this way. You will know exactly what temp the switch opens at.