Question about 1990 Nissan 300ZX

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Problem with the clutch switch for '90 300zx

I have a 1990 Nissan 300zx, When I turn the key it wont crank. I know it's not a battery problem, because everything else works. Right now I have it straight wired from the starter to the battery and it cranks fine, So Im assuming it's the clutch switch. How do I know for certain this is what it is.. and How would I go about fixing this?

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Check your starter key switch on the steering column.
the contact for the starter is wired to the key selector.
you need the Factory Service Manual fot trace out the wire. In general, the starter wire is red, the current runs from the battery to the key switch then to starter motor.

If you have wired from stater to the battery directly, you are bypassing the key switch.
The clutch switch is mounted on the top side of the transmission near the converter housing. again, you need to located the FSM in order to figure out exactly where it is.

Posted on Dec 08, 2008

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Turn key wont crank


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Do you hear a clicking sound when you turn the key to "START"? If so, I'd say your battery is dead.

Do any of your gauge lights, head lights, radio, etc. work just fine? If so, I'd guess you have a bad ignition, bad coil, or bad starter.

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About the only thing you didn't mention was the starter itself. You could have it tested. But before that, try to see if you have power on the small wire to starter solenoid on the starter, when key is held in cranking position. Pull the small wire off and check for power with a multimeter or a testlight while someone holds the key in crank. This is the signal wire from ignition switch that closes the elec. contacts inside solenoid so the starter gets full power from the battery to spin. (This wire also is in the circuit with the clutch switch and the starter relay.) If you have power on this wire in crank, it is very likely the starter is bad. If there is no power, check that circuit out. It is losing power somewhere from switch to starter solenoid. Good luck.

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Guru........Saailer








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