Author Topic: 69 z11 wiring fault  (Read 3623 times)

sebs

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69 z11 wiring fault
« on: October 31, 2015, 02:32:49 PM »
hi i wonder ifr anyone out there can help,ive got a unrestored z11 auto ,when the ignition is switched on ,the purple wire on the main junction box on the firewall over heats and starts to smoke ,if i turn the engine over a few times it over heats more and then will not engage the starter,wiring is standard but it has been changed from column to floor shift with a counsol fitted many thanx to anyone giving advise

william

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Re: 69 z11 wiring fault
« Reply #1 on: October 31, 2015, 02:59:15 PM »
Sounds like a poor ground. Is the shifter harness properly grounded to the floor pan?
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ko-lek-tor

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Re: 69 z11 wiring fault
« Reply #2 on: October 31, 2015, 06:58:13 PM »
Or...when 'juice' (batt.) is applied to wire by turning on ignition, that purple wire is directly shorting out to a grounded surface.
Bentley to friends :1969 SS/RS 396 owned 79
1969 SS 350 (sold)
1969 D.H.COPO replica 4spd. owned since 85
1967 302 4 spd 5.13

sebs

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Re: 69 z11 wiring fault
« Reply #3 on: November 01, 2015, 12:16:50 PM »
well worth a look ,fingers crossed ,many thanx

jdv69z

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Re: 69 z11 wiring fault
« Reply #4 on: November 01, 2015, 04:29:36 PM »
I'm guessing short? With the ignition off, try using a meter on ohms setting between the purple wire and ground. You should not get anything ie no connection. If you get a connection, ie 0 resistance, you've got a short.
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JohnZ

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Re: 69 z11 wiring fault
« Reply #5 on: November 01, 2015, 06:41:40 PM »
I'm guessing short? With the ignition off, try using a meter on ohms setting between the purple wire and ground. You should not get anything ie no connection. If you get a connection, ie 0 resistance, you've got a short.

That purple wire goes from the ignition switch (and the neutral safety or clutch safety switch) directly to the small "S" terminal on the starter solenoid, and isn't involved in any other circuits; somewhere between the ignition switch and the starter solenoid, that purple wire is chafed and/or shorted to ground.
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ko-lek-tor

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Re: 69 z11 wiring fault
« Reply #6 on: November 01, 2015, 07:22:41 PM »
I'm guessing short? With the ignition off, try using a meter on ohms setting between the purple wire and ground. You should not get anything ie no connection. If you get a connection, ie 0 resistance, you've got a short.

That purple wire goes from the ignition switch (and the neutral safety or clutch safety switch) directly to the small "S" terminal on the starter solenoid, and isn't involved in any other circuits; somewhere between the ignition switch and the starter solenoid, that purple wire is chafed and/or shorted to ground.
Or...when 'juice' (batt.) is applied to wire by turning on ignition, that purple wire is directly shorting out to a grounded surface.

I think I read that somewhere?
Bentley to friends :1969 SS/RS 396 owned 79
1969 SS 350 (sold)
1969 D.H.COPO replica 4spd. owned since 85
1967 302 4 spd 5.13