Check the setting on your multimeter and make sure the range will be able to test over 10K ohms of resistance, if its set to say 0-200 or 0-2000 then anything over wouldn't necessarily register, it would just show open. If your using a fluke digital or something that will auto adjust itself, then it should read from 0 to meg ohms. If your like me I have a cheapo chinese analog meter with a dial then you have to switch to a higher setting for the K ohms.
Ive had the water temp code before and it was a shorting connection because my plug was internally broken allowing the pins to touch. I fixed it by getting a fuel injector plug thats keyd the same and just spiced it in.
I have also changed my distributor for an open reading inside on the NE circuit. It was a while ago so I don't remember what led me to read it out.
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