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Author Topic: 1978 k10 electrical problems  (Read 10530 times)

Offline johnnyd

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1978 k10 electrical problems
« on: March 24, 2010, 05:36:04 pm »
 could it be that there is to new of a steering column in my truck, u turn on the turn signals and the hazards come on , you turn on the hazards and nothing comes on , one more thing u turn the key off and the saften seatbelt light comes back on very dim dont know what thats from either something backfeeding through the ignition?
« Last Edit: March 25, 2010, 03:12:50 pm by johnnyd »
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Offline Captkaos

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Re: 1978 k10 electrical problems
« Reply #1 on: March 24, 2010, 06:34:40 pm »
Sounds like you have a blown bulb somewhere or a bad ground.
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Offline Irish_Alley

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Re: 1978 k10 electrical problems
« Reply #2 on: March 24, 2010, 07:24:26 pm »
Does it do it with the running lights on or off or both. What about which turn signal you use left or right what about if you use the brakes . But like capt said sounds like a bad ground or bulb
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Offline lucki17

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Re: 1978 k10 electrical problems
« Reply #3 on: March 25, 2010, 07:26:33 am »
i have a 78 k10 also, it has a newer steering column too, the one with the blinker that also does the wipers and stuff but thats all disconnected so it just handles turn signals now, anyways i had kinda the same problem, i just swiched out the relays for new ones (both hazerd and turn signals) and took out the gauges and cleaned all the leads and everthing then finally looked at the wires and they were a total hack job so i redid the connetions and now everything works great! all in all it was like 10 bucks and maybe an hour tops. maybe that will help... not a bad idea anyways. do they work outside?
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Offline johnnyd

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Re: 1978 k10 electrical problems
« Reply #4 on: March 25, 2010, 11:51:59 am »
the trucks pretty hacked up best thing would to go through all the hillbilly wiring its a k10 frame with a k20 body with a k10 dash and vin but a k20 cab u all follow me its been down to the frame and just throwed back together didnt find all this out till after the fact it was in my driveway ;D
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Offline lucki17

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Re: 1978 k10 electrical problems
« Reply #5 on: March 26, 2010, 01:52:54 am »
ha ha yeah id just go through the wiring then, i know on mine the signals are the purple wire and hazerds are yellow, dont know if yours is the same, but maybe yours got crosed or something. there is a wiring diagram on this site in the technical pages, should be able to figure out whats what with alittle investigating.
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Offline johnnyd

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Re: 1978 k10 electrical problems
« Reply #6 on: March 26, 2010, 02:25:04 pm »
thats how i found this site did a google search and this came up gonna be pretty useful ;D
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Offline johnnyd

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Re: 1978 k10 electrical problems
« Reply #7 on: March 27, 2010, 04:27:13 pm »
just took all the tape off the FACTORY wires they are burnt up everywhere no wonder nothin works what to do now? ??? :'( :(
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Offline VileZambonie

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Re: 1978 k10 electrical problems
« Reply #8 on: March 27, 2010, 04:28:45 pm »
Which wires are burned up?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline johnnyd

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Re: 1978 k10 electrical problems
« Reply #9 on: March 27, 2010, 05:57:30 pm »
the ones goin up to the gauge panel, to the light switch, to the wiper switch, inside the fuse box, not to happy at the moment, u no anyone with a dash harness for sale
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Offline VileZambonie

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Re: 1978 k10 electrical problems
« Reply #10 on: March 27, 2010, 07:03:01 pm »
Find a donor harness or buy a parts truck with the same options your truck has. Check all of your circuits too because there's usually a good reason why wiring burns up.
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,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

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

Offline johnnyd

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Re: 1978 k10 electrical problems
« Reply #11 on: March 27, 2010, 07:26:46 pm »
 i found a wrecked 79 i can help myself to all the wiring in it think ill just get everything that gets hooked into wiring also ;D
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Offline johnnyd

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Re: 1978 k10 electrical problems
« Reply #12 on: March 30, 2010, 07:32:18 pm »
just found out my 78 is actually a 73 oh boy! ;D got a harness from 79 will it work got it all
« Last Edit: April 01, 2010, 07:10:28 pm by johnnyd »
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