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#1 |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
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Odd electrical problem, '72 blazer ignition switch woes
The key stopped turning off the ignition a while back, so I wired up a switch to shut the truck off. Yesterday, the key would not turn any of the accessories off, so today I went and purchased a new ignition switch. I replaced the switch, and still had the same problems. Ignition would not turn off, and accessories still would not shut off. After cycling the key a couple of times, the ignition began to "try" to turn off, and soon it began to shut off accesories as well, but not every time like its supposed to. Is there some vauge anchient indian secret to apeasing the gods here?
Thanks in advance.
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Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#2 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Sounds like your key tumbler is the problem. You can buy them new also.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#3 | |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
|
Quote:
Key tumbler? the actual housing for they key? I dun get it (yet)
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Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#4 | |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Quote:
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#5 |
II Timothy 4:2
Join Date: Mar 2005
Location: Fort Worth
Posts: 361
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My truck did that, and it turned out to be the stater solenoid sticking. Just a thought.
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72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk." |
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#6 | |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
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Quote:
If it is sticking, wouldnt it be killing power, instead of leaving it on? And I dont see how I would need a new cylinder, all it does is act like a fancy screwdriver with tumblers.
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Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#7 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,467
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Get your truck into the state where the key is in the "off" position, and the engine is still running, and then unplug the wiring harness from the back of the ignition switch. If the engine continues running, then maybe the problem is not in the ignition switch at all and it's somewhere else.
By any chance are you turning your key all the way to the left when turning the engine off? The "ACC" position is all the way to the left, and off is with the key straight up and down. The only reason I mention this is because several months ago there was a board member with a similar problem, and it turned out he was leaving his ignition in the "ACC" position. |
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#8 | |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
|
Quote:
With the old switch, the motor stayed on regardless of the position of the key. ACC, off, run, key out, it didint matter. Now the motor "thinks" about shutting off more when not in the run position.
__________________
Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#9 | |
II Timothy 4:2
Join Date: Mar 2005
Location: Fort Worth
Posts: 361
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Quote:
__________________
72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk." |
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#10 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,467
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I think jtminton is onto something. You could try disconnecting the yellow wire from the outer terminal of your starter and see if the problem goes away.
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#11 |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
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I will have to give that a try.... Damn parts house starters....
__________________
Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#12 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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If your solenoid sticks your starter would stay engaged.
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#13 |
SKINNY TIRES RULE!
Join Date: Sep 2001
Location: Bothell, WA
Posts: 11,049
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What kind of condition is the plug that goes into the back of your ignition switch? I've had two go bad (one on each blazer)
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bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L |
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#14 | |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
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Quote:
Looks to be in excellent condition to me. No short insulation, discolored wires, contacts looked good....
__________________
Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#15 |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
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well, it looks like JTminton was right. had key off, truck still running, started whacking the solenoid, truck shut off. It was like magic. Thanks for the input guys :beer:
__________________
Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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#16 | |
II Timothy 4:2
Join Date: Mar 2005
Location: Fort Worth
Posts: 361
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Quote:
__________________
72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk." |
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#17 | |
Having issues
Join Date: Jul 2005
Location: Eldorado Ca, an hour east of sacramento
Posts: 696
|
Quote:
__________________
Quando Omni Flunkus Moritati. The Man's Prayer: "I'm a man, but I can change, if I have to, I guess." |
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