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1997 Nissan Pickup - Have 12v at coil harness connector, but…

Customer Question
1997 Nissan Pickup - Have 12v...
1997 Nissan Pickup -
Have 12v at coil harness connector, but not at power transistor harness connector. I'm test the 2nd wire from the left on the connector which is black (or dark blue) with a pink stripe. The wire also has something 6" from the connector that is a larger black piece (resistor?).
Any idea how I can find where I'm losing voltage?
Submitted: 7 months ago.Category: Nissan
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Answered in 1 minute by:
1/7/2018
Nissan Mechanic: Jay, Nissan Technician replied 7 months ago
Jay
Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 21,811
Experience: 20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
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Hello my name is ***** ***** thank you for your question.

Most common cause of this is the distributor it's self. The distributor has the Cam Sensor built into it and that sends the signal that the engine is turning over to the computer so the computer can determine when to deliver spark. So I would check your distributor for your issue.

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Customer reply replied 7 months ago
Can you tell me how to conduct this test?
Nissan Mechanic: Jay, Nissan Technician replied 7 months ago

Hang on. Let me give you info from the factory manual

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Nissan Mechanic: Jay, Nissan Technician replied 7 months ago
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Nissan Mechanic: Jay, Nissan Technician replied 7 months ago

That is the diagnostics steps, and wiring diagrams right from the factory manual for you. I included the Ignition Primary Circuit and Cam Sensor which work together.

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Customer reply replied 7 months ago
no voltage in the #2 wire of power transistor harness connector could be due to a bad distributor? I assumed the distributor needed voltage from this connector. Is the voltage going the other direction?
Nissan Mechanic: Jay, Nissan Technician replied 7 months ago

The number 2 wire is the ground wire. The coils, Power Transistor and Cam Sensor are all part of the distributor it's self.

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Customer reply replied 7 months ago
I just noticed my rotor plate is damaged around the profile that goes on the distributor shaft. It also appears to have some wear marks on the surface near the perimeter. Could that be my problem?
Customer reply replied 7 months ago
I forgot to mention I have replace the coil, rotor and power transister
Nissan Mechanic: Jay, Nissan Technician replied 7 months ago
If the signal plate is damaged, yes that can certainly be your issue.
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