I was wondering if you had specs for normal initial amp draw for the heater say @ room temp and do you have a voltage vs. temperature chart for both the Air Intake sensor and the Coolant Temperature so the temp of the sensors can be checked with a voltmeter as I dont have a scanner. Thank you!
I do not have a voltage vs temperature chart for the sensors. Sorry. I wish Cat made one but they do not for truck engines.
They also do not give a spec for how many amps the heater draws. But there is a way to find out by using Ohms law. To find the amps, all we would need to do is measure the Ohms of the heater apply 12 volts divided by how many Oh,s we got when we measured it.
I do not have a good heater that I can measure the Ohms for you or I would.
However, the main problem that heaters ever give is on open circuit and fail.