what's it mean secondary coil resistance is 11.2 and not 11.3

25

Asked by robertbridgman Dec 23, 2014 at 02:54 PM about the 1994 Dodge RAM 1500 LT LB RWD

Question type: Maintenance & Repair

I tested the primary and secondary resistance on my coil and the seconday reading was 11.2 not 11.3 as the manual specifies.does that mean that I need to replace the coil??

2 Answers
11,075

ytlas answered 10 years ago

A tenth? Difference in calibration between meters. When I was measuring a coil using my cheapie Harbor Freight multimeter I was getting readings that were "all over the place." I took out my good meter and got a lot more steady and sensible readings.

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11,075

ytlas answered 10 years ago

In the back of the meters there's a potentiometer used to calibrate it at the factory. They can miss by a hair :)

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