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73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: 80Chevy4x4 on October 30, 2016, 12:30:07 PM

Title: 1980 Chevy K10 Transfer case wiring
Post by: 80Chevy4x4 on October 30, 2016, 12:30:07 PM

I have been trying to look all over this site and other sites....I am trying to find the wires for the 4 wheel drive light...i have the switch on top of the transfer case but i can not find the wires or the right wiring diagram to locate where the wires run from.   Thanks

Title: Re: 1980 Chevy K10 Transfer case wiring
Post by: bd on October 30, 2016, 01:31:17 PM

The 4WD indicator switch is illustrated just to the left of the fuse box in the 1980 Wiring Manual (http://www.73-87chevytrucks.com/techinfo/7387CKMans//Wiring/ST_352_80_1980_Chevrolet_Light_Truck_Wiring_CK_10_30_Only.pdf#page=9).  The dashed lines mean the switch and indicator only apply to four wheel drive applications.  Check the engine compartment firewall for a two terminal connector that has white and black wires running down toward the T-case.  The T-case harness maybe dangling or may have been removed and discarded.

Title: Re: 1980 Chevy K10 Transfer case wiring
Post by: 80Chevy4x4 on October 30, 2016, 04:16:30 PM

Thanks a million..I will check it....It helps a lot.

Title: Re: 1980 Chevy K10 Transfer case wiring
Post by: 80Chevy4x4 on October 30, 2016, 05:37:09 PM

I found a black wire and white wire...it goes to a believe a relay....the number on the relay is 14014515   i look it up and it says it is a TCC relay....my truck never had a lock up convertor.....anyone know what this relay is for on the 80's?   thanks....i have been looking at the wiring diagram and can not find it.

Title: Re: 1980 Chevy K10 Transfer case wiring
Post by: Kip on November 12, 2016, 01:27:11 PM

I have 79 K20 my 4wd light wire comes from under the dash runs under the mat and under the shift boot and it is black & white I know it's factory I've known the truck since it was new it has live a pampered life