Quote:
Originally Posted by Superman
This is the rear window defrost circuit. You know....those thin lines in the rear glass. Schematics show a single circuit but that's wrong. There are two circuits. One feeding 9 lines and the other feeding ten. I've reconfigured so that one wire feeds 7 and the other feeds 12.
To answer your question, I measured the resistance of the circuit feeding 12 of those thin defroster lines. 1.8 Ohms. I measured from the ground lug wire running to the "-" connections in the glass to the "+" wire coming from the circuit in question. Everything is removed from the car. This is really 1.8 Ohms. Fluke.
The wire may be 14 ga. Can a 14 ga wire handle 1.8 Ohms of resistance in an automotive application (12-14V)?
|
gauge 'handles' current. 14 awg should be fine for 7 amps.
Measure voltage across the load (defrost glass) should be close to 12 volts. If your meter can handle it measure the current, or if you have a test light put it in series with the defroster and it should light up.