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06-12-2019, 01:43 PM
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#1 |
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Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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Truck will not turn off
I have a 1979 K5 Blazer and today, after going to run some errands, the truck will not turn off with the key turned off and even removed. I have to pull the hot wire off of the distributor to shut off the engine and pull the negative battery cable to disable the electric fuel pump. I would assume its either the key lock cylinder or the ignition switch, but I figured I would consult y'all first before digging into anything.
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
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06-12-2019, 02:15 PM
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#2 |
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Post Whore
  
Join Date: May 2015
Location: Alabama
Posts: 14,583
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Re: Truck will not turn off
that would be a place to start
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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06-12-2019, 02:37 PM
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#3 |
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Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,477
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Re: Truck will not turn off
Feedback from the Alt through the Alt light/field wire can cause run on. Normally fails open but you can check by pulling the 2 wire plug out of the alt.
Agree that most probable is ignition switch or the linkage from the key cylinder to the switch. |
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