Ignition overload

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Merchdoor
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Ignition overload

Post by Merchdoor » Sun Jun 11, 2017 8:26 pm

1978 Trojan f30 with Chrysler 318. Engine starts up and runs fine for about 5 minutes then overload trips. I replaced the wire from the overload to the main overload on the engine and installed an inline fuse to replace the overload for temporary use and the fuse still blows. Any suggestions?

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Flyboy
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Re: Ignition overload

Post by Flyboy » Sun Jun 11, 2017 9:58 pm

Just a thought, your starter may not be disengaging.
1981 10 meter Trojan International

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prowlersfish
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Re: Ignition overload

Post by prowlersfish » Sun Jun 11, 2017 10:01 pm

Any high Loads like a inverter ? . Charging system ok, not over charging ? Has a higher amp alt been installed ? I would see what the amp flow is using a amp meter . A bad battery could cause a high load on the alternator and pop the breaker . And lastly I have seen a weak breaker do it also . What Amp fuse are you using to by pass it ?


Saw flyboys post that's something to look at too
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

Merchdoor
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Re: Ignition overload

Post by Merchdoor » Mon Jun 12, 2017 6:19 am

I installed a 15 amp fuse to replace the 15 amp breaker. At first I unplugged the ignition coil wire and turned the key on without starting the engine and the overload popped. So I replaced the wire. It seemed to work then started to blow again. The battery is new and has a full charge. Haven't changed alternater. One last thing. The Iginition wire runs from the ignition overload to a 40 amp overload on the engine. Could the 40 amp overload be bad? Get working on issues these things and the brain shuts down due to frustration. I did notice the other engine does not have this 40 amp overload. Don't know if it should. If the starter was not disengaging would I be able to hear it?

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prowlersfish
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Re: Ignition overload

Post by prowlersfish » Mon Jun 12, 2017 7:53 am

Merchdoor wrote:I installed a 15 amp fuse to replace the 15 amp breaker. At first I unplugged the ignition coil wire and turned the key on without starting the engine and the overload popped. So I replaced the wire. It seemed to work then started to blow again. The battery is new and has a full charge. Haven't changed alternater. One last thing. The Iginition wire runs from the ignition overload to a 40 amp overload on the engine. Could the 40 amp overload be bad? Get working on issues these things and the brain shuts down due to frustration. I did notice the other engine does not have this 40 amp overload. Don't know if it should. If the starter was not disengaging would I be able to hear it?

I can not find a diagram showing 2 beakers . Only showing 1 and its looks to be the 40 amp . Can you post a photo of them and wiring ? Now let me see if I understand this . you discounted the wire from the 40 amp to the 15 amp breaker and it still blew ? You would think the 40 amp feeds the 15 and it would not blow due to no power. Is there 12 volts at this wire when the breaker is blown ? With the 15 breaker blown is the 40 amp have power on both sides ?
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

Merchdoor
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Re: Ignition overload

Post by Merchdoor » Mon Jun 12, 2017 8:39 am

The wire comes from the coil to the 40 amp breaker. There breaker has two wires coming off it. One runs directly from the 40 amp breaker to the 15 amp breaker. This feeds the ignition switch. I initially disconnected the wire from the coil to the distributor cap to try and isolate the issue. When I did this the breaker still tripped when I turned the ignition switch on. So I started to focus on the wiring from the 40 amp breaker to the 15 amp. The 15 amp has an actual mounting cut out on the dashboard for it and both engines have this breaker. So I'm sure it's original. Did not check power after the 15 amp breaker blew. I believe there is still power. Once the 15 amp breaker blows all I have to do is push the button and everything comes in and I can start the engine again. And it will run for about 10 minutes and the blow again and shut down. The other engine runs fines and only has the 15 amp in the dash it does not have the 40 amp for some reason.

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prowlersfish
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Re: Ignition overload

Post by prowlersfish » Mon Jun 12, 2017 9:19 am

Ok now I got it .I thought you were saying a 15 amp on the engine . Try disconnecting the wire on the ballast resistor and see what happens with key on . There is a chance the resistor is shorting out or a coil . Also could be a ignition module . A Ballast resistor is cheap and a spare IMO is a must have .
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

Merchdoor
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Re: Ignition overload

Post by Merchdoor » Mon Jun 12, 2017 3:45 pm

I will do that. Thank you so very much for the help. I really appreciate it. I'll let you know how I make out.

Merchdoor
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Re: Ignition overload

Post by Merchdoor » Fri Aug 03, 2018 9:02 pm

Well it took a year but the fix was found by accident. It seems there was a wire near the steering housing. When you turned the wheel a certain there was enough flex on the wheel that it moved just enough to touch the wire and ground out the ignition and shut off the motor. Replaced the wire and everything works fine. That you all for the suggestions and help. Much appreciated.

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