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rear window defrost 240d
Gentlemen,
I'm working on my 81 240D on my vacation, and decided to tackle the rear window defrost. I have access to the connections to the window, and have verified that the switch, relay and wiring are OK. there are no visible open circuits on the glass and I have cleaned the connections to power and ground. I have twelve plus volts at the glass, and a good earth. The question is, I show resistance of about 175 ohms through the window and when i measure power through the glass by unhooking the ground and connecting a voltmeter I get a reading of about 1.5 volts. is this correct? I cannot feel any heat from the window . Its about 60 degrees out right now so no frost to melt. Jon J Wichita Ks 81 240D 300,000 mi |
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