Author Topic: Ignition Switch Connector / harness  (Read 2234 times)

Offline teamcurtis

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Ignition Switch Connector / harness
« on: March 25, 2018, 03:48:29 PM »
So the previous owner must have lost the key and not bothered to change the lock cylinder. The wired in a new key and stuffed it into the dash.
I've replaced the lock cylinder, and the rod seems to be connected correctly. My question comes for part numbers for the ignition switch connectors. Looks like i need two, but cant seem to find exactly what i need. The plastic plugs,pigtails, or harness (whatever you want to call them) are completely gone.

Any help?

1978 c10 shortbed 350 sb
« Last Edit: March 27, 2018, 05:00:52 PM by teamcurtis »
1978 C10 Short Bed
350 smogged for CA

Offline VileZambonie

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Re: Ignition Switch Connector / harness
« Reply #1 on: March 25, 2018, 07:25:37 PM »
You can look them up by application and cross reference the numbers

http://www.acdelco.com/professionals/pigtails.html
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline teamcurtis

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Re: Ignition Switch Connector / harness
« Reply #2 on: March 27, 2018, 03:34:13 PM »
ok so i THINK i have the right plugs on order

https://www.oreillyauto.com/detail/bwd-3123/lighting---electrical-16777/connectors-sockets-16631/ignition-switch-connector-11467/bwd-5-wire-ignition-switch-connector/pt183/2603162/1978/chevrolet/c10-pickup-rwd?q=Ignition+Switch+Connector
and
https://www.oreillyauto.com/detail/bwd-3123/lighting---electrical-16777/connectors-sockets-16631/ignition-switch-connector-11467/bwd-5-wire-ignition-switch-connector/pt6110/2603802/1978/chevrolet/c10-pickup-rwd?q=Ignition+Switch+Connector

Now I have to figure out what the heck the PO did with the wiring.

He put in a generic key switch with 3 terminals IG, SOL, and Bat

IG - two connections
      thick pink wire
      Brown/white, orange, brown, blk/white, purple/blue
SOL - Purple/blue
Bat - both  Red Wires

From the main harness
Brown/white
Orange (thick)
Brown (thick)
Blk/white
Red (thick)
Red (thick)
Purple/blue (thick)
Pink (thick)

Tips on how to correct this mess and get it wired correctly?
1978 C10 Short Bed
350 smogged for CA

Online bd

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Re: Ignition Switch Connector / harness
« Reply #3 on: March 27, 2018, 04:54:33 PM »
What year model truck are we discussing?  Go to the GM manuals section of the site and click on the appropriate year wiring manual.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline VileZambonie

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Re: Ignition Switch Connector / harness
« Reply #4 on: March 28, 2018, 09:43:47 AM »
I would lower the column and make the connections to the switch, solder and heat shrink your connections to the harness. Make sure you leave enough slack to loom the wires and raise the column.
,                           ___ 
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              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline teamcurtis

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Re: Ignition Switch Connector / harness
« Reply #5 on: March 28, 2018, 10:05:01 AM »
that is the plan... the column is already down and the second plug/connector should be in today. but I'm less than positive as to which wire goes on which pin.
ive found a few diagrams that seem close, but none that give me total confidence.
1978 C10 Short Bed
350 smogged for CA

Offline VileZambonie

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Re: Ignition Switch Connector / harness
« Reply #6 on: March 28, 2018, 10:39:25 AM »
See image
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10