C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Ignition switch?

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Old Apr 22, 2014 | 01:00 PM
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Default Ignition switch?

I have a 85 C4 the electrical circuits are heavly modified. The horn wasn't working finally decided the fusible link was burned somewhere. I tried to hot wire the red wire from the security fuse to the input of the horn relay. As I snipped I kept starting the the engine no issues. Then i got a spark when i tried the red wire to the horn (green) wire should have sounded the horn but didn't. Now all electrical s tied to the ignition switch are off, everything not switch related works. Is there a fuse or circuit breaker somewhere I haven't checked or is the switch toast. The car has 150K miles on it?
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Old Apr 22, 2014 | 04:47 PM
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Sounds like youve fried a fusible link somewhere. Hopefully someone will chime in with the location. If not I will drag out my FSM and see if it shows where it is.
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Old Apr 22, 2014 | 07:40 PM
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Originally Posted by HlhnEast
Sounds like youve fried a fusible link somewhere. Hopefully someone will chime in with the location. If not I will drag out my FSM and see if it shows where it is.
Thanks for the info, hope its not in the rats nest behind the dash
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Old Apr 23, 2014 | 02:54 AM
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Most of the fusible links are on the "jumper post" behind the battery.
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Old Apr 23, 2014 | 08:02 AM
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Originally Posted by Cliff Harris
Most of the fusible links are on the "jumper post" behind the battery.
If it were fried then I should find broken wire at the post? Is it possible it's just the ignition switch?
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Old Jun 9, 2014 | 12:39 PM
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Default ignition switch

Originally Posted by mikerumizen
If it were fried then I should find broken wire at the post? Is it possible it's just the ignition switch?
The problem solved. For everyone's information the fusible links, there are 2, are from the starter to the alternator and from the starter to the battery
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Old Jun 10, 2014 | 12:08 AM
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My FSM shows 10 fusible links, so your count is a little off...
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Old Jun 10, 2014 | 06:14 AM
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Default Fusible Link

Originally Posted by mikerumizen
If it were fried then I should find broken wire at the post?
For others benefits, I've had a couple of fusible links shorted in the past. They weren't broken or burnt off, they were shriveled up on the wire portion, burnt out and shriveled. In one case it wasn't even apparent till checking it out with an ohm meter.
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Old Jun 10, 2014 | 08:03 PM
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Originally Posted by Cliff Harris
My FSM shows 10 fusible links, so your count is a little off...
I think the ones that shorted the ignition are these two, I found a good mechanic who fixed it after I stared at it for a month so I am happy. Where did you get the FMS wiring I bought a service manual on CD and the wiring section is omitted. Thjanks for your interest it's appreciated.
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Old Jun 11, 2014 | 02:26 AM
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The FSM page numbering system changed over the years, but the fusible links in my book are on page 8A-10-0. The only one missing from that page is the one on the starter solenoid that goes to the HVAC blower motor. I can post a copy of that page if you need it.
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