Block heater

[farmhand]

Is there anyway to check for a short on the block heater? Im putting a new plug on it this weekend. 2000 F350 249k miles

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[Fred Swanson]

You can ohm it out by putting the test probes on the plug....I can't remember the correct ohm's it should read but there is a article somewhere here about testing the heater.....Fred

[Fred Swanson]

Ok I found it....it should ohm out at 14-16 ohm's using a probe on each of the flat plug prongs at the same time.....Fred