Thx!  I hadn't considered that.

On 01/02/2017 10:05 AM, Curley McLain via Mercedes wrote:
ANY GP WIRES THAT ARE GROUNDED ON THE MANIFOLD (most common problem) WON'T SHOW THE FAULT WITH THE MANIFOLD REMOVED.

Larry Turner via Mercedes wrote:
I plan to take the intake manifold off (as soon as I get a stubborn bolt out) and then I will inspect the wiring looking for possible shorts.

When you have known good GPs, ( I used to always check new ones ) check them with the meter until you find a meter that will consistently show a difference between 0 ohms and .8 ohms or beteeen 0 and 1.2 ohms. Once you find a meter that shows a difference, then you can check used ones in the engine with a ohm meter.

It is not so much what the reading is, so long as it is able to show a difference between 0 ohms and 1 ohms. This was particularly true in the days of the analog meters.

If you post your fluke model number, perhaps someone can tell you its capability to differentiate between 0 and 1 ohm, assuming test leads are good.


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