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Author Topic: Ignition switch  (Read 2131 times)

Offline landry

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Ignition switch
« on: October 04, 2017, 08:06:44 AM »
Does any one have a wiring diagram for an ignition switch I have a 1985 c10 short bed 305 v8.
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1/2 ton 1985 c10 short bed 305 v8 th300

Online VileZambonie

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Re: Ignition switch
« Reply #1 on: October 04, 2017, 11:20:07 AM »
http://forum.73-87chevytrucks.com/smforum/index.php?topic=11766.0

and here is a generic one that may or may not be entirely accurate so always reference the manuals...
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 75gmck25

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  • 1975 GMC K25 Camper Special, 350/TH350/NP203
Re: Ignition switch
« Reply #2 on: October 20, 2017, 07:15:31 AM »
FYI - the key switch in the column is just that, a key and tumblers that operate a small geared rack.  The electrical connections are not on the end of the switch.

The start/run electrical connections are mounted at the bottom of the column and operated by a rod that connects up to the geared rack on the end of the switch.  If the geared rack is cracked or broken, the rod does not move correctly and operate the electrical switch.

The switch is fairly easy to replace, but replacing a broken rack takes a lot more disassembly of the column. 

Bruce
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