Quote:
Originally Posted by natedogg
I'm having the same issue with my 84. Bought a new temp sensor at the parts store, installed it and now it reads too high. How do you read the resistance on the temp sensor to make sure you have the correct one for your truck?
|
You will need a Ohm meter(the O in VOM). Disconnect the existing sender wire and connect one side of the meter to the sender tab and the other to the engine block. Cold, and depending on ambient temps, your reading should be either a few hundred ohms or between 2 and 3 thousand. As the engine warms, the reading should drop to under, IIRC, 100 ohms, again depending on how warm the engine gets. A 160* tstat may not get under 100 while a 195* should.
There are some resistance curve charts either posted or linked to in some other forum threads on this subject.