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#1 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Ignition stays hot!
So my keyed ignition is live constantly.bIs there any reason for this? My pink ignition wire is always hot so when i start the truck it won't turn off u til I pull the fuse! Also every fuse in the fusebox is getting power even with the switch in off position.
Anyone have a diagram of the ignition switch wiring so I can trace? Or you think maybe the ignition is in need of replacement
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1967custom Last edited by michael bustamante; 04-21-2020 at 06:47 PM. |
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#2 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,403
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Re: Ignition stays hot!
Could be wiped out contacts in the switch. Did you do anything with the starter recently? The yellow wire on the starter has been known to cause this, as it feed the coil only during cranking unless it's touching the big post on the starter. Doesn't apply if you have an HEI.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#3 |
Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: Ignition stays hot!
I'm probably wrong, but I had a similar experience with my tractor and it was a shorted/ faulty alternator.
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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#4 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,403
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Re: Ignition stays hot!
Saw this after I posted mine. Maybe someone else who has done an LS swap has seen this? Depending on what wiring changed, that could be the cause, power feeding back from the alternator.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#5 |
Just here to tinker
![]() Join Date: Jun 2008
Location: Holland, MI
Posts: 3,692
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Re: Ignition stays hot!
I have experienced this before as well where alternator was backfeeding into ignition wire. Take the alternator belt off and try a few stop/starts. Obviously don't run it too long....
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#6 |
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Location: 2nd left past the stump on a dirt road.
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Re: Ignition stays hot!
Check to see if you still have the brown/white resistor wire in the harness.
I was losing switches about every 8-14 months. Heater only truck the Blower Fan is drawing too many amps through the harness cooking components. |
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#7 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: Ignition stays hot!
hmm no i dont think it could be this, if i turn the ignition to the on position without sarting it and turn the key off, the pink still stys hot
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1967custom |
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#8 |
Registered User
Join Date: Apr 2011
Location: Fairview Park, Ohio
Posts: 1,031
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Re: Ignition stays hot!
Put a tester on the ignition switch.
See if power goes off with key on off position I’m betting on wore out ignition switch. Easy to replace and many places carry them. Posted via Mobile Device |
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#9 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: Ignition stays hot!
Ya I'm thinking the switch too. I am 95 percent done in the ls conversion and I start the engine, no oroblem. then turn the key off and the truck is still running!!! Lol. When I pull the power off the battery and hook it back up the switched power is dead till I turn the ignition on again and then the pink sure stays hot! I have another new switch. I'll switch it out this weekend and see what happens
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1967custom |
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#10 |
Registered User
Join Date: Apr 2006
Location: Spring, Texas
Posts: 167
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Re: Ignition stays hot!
I've seen the same thing with the alternator excite wire. Sometimes it needs a diode to keep it from back feeding.
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'72 3/4 Cheyenne Super 402/TH400 Gear Vendors '72 3/4 Cheyenne Super 350/200R4 '50 1/2 Chevy 3 Window |
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#11 |
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Location: 2nd left past the stump on a dirt road.
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Re: Ignition stays hot!
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#12 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: Ignition stays hot!
no i dont have these wires anympre. i did the LS conversion,
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1967custom |
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