Procedure for checkng power to the CDI unit

[Sunroof]

What is the proper procedure to check for power going into the 3-pin CDI unit? The CD unit is off the car and the three pin plug is exposed (red, green and black wires). I believe the red wire is the power wire to the CDI unit, but not positive. How would you check for proper voltage to this unit?

Thanks

Bob
73.5T

[HarryD]

Hi Bob:

Always thrilled to help a fellow with a 1/2 year only car.

This thread may be helpful: CDI Box Troubleshooting Help.

You will find this in that thread:

Originally Posted by HarryD

You better check your wiring diagram. Per Permatune (http://www.perma-tune.com/T-ignition-Porsche-911.html):
A = + or 15, coil hot primary terminal ( - or 1, coil ground primary terminal is connected to the engine ground).
B = Power from ignition switch.
C = Distributor breaker points.
D = Ground


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