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87 760 turbo has no negative pulse at coil! Experts needed! 700 1987

posted by  someone claiming to be mescalinedreamz on  Sat Apr 16 06:07 CST 2005 [RELATED]

i have a white and blue wire at the coil, white is negative and blue is positive. When i have the wife start the car, i check voltage from a good ground to the positive of the coil. I get 12 volts when the car is trying to start. I then put the + of the voltmeter on a known positve and put the - on the negative of the coil and test it while starting. I get no pulse. I get no ground at all! I then tested the + and - of the coil while trying to start it, i get 0 because the negative of the coil isnt even a negative. But my positive side when checked to a known ground i get 12 volts.

So what should i check next? i obviously have a no spark condition and i ruled out the coil by jumping it and i get spark at the plug that the rotor is pointing to. So what should i check next and where are the locations of the part on the car? And what is the testing procedure?






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