Electrical issue, 62 c10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jchav62 · 07-12-2018, 09:21 PM

So yesterday i went out to the garage and decided to fire up the truck. Reached in as i normally do, turned the key.... one click, then everything was completely dead... no lights, no radio, nothing. Unhooked the battery, to check for corrosion, all was good, reconnected it. Had power again. Tried starting it again... one click and all dead again. I replaced the positive cable.... no change. What would cause this? Bad solenoid? Wiring issues? Thanks
JC62

TopFuel1966 · 07-12-2018, 09:29 PM

Possibly a shorted cell in the battery. It works under a light load but not a heavy one.

jchav62 · 07-12-2018, 09:53 PM

Quote:

Originally Posted by TopFuel1966

Possibly a shorted cell in the battery. It works under a light load but not a heavy one.

Still reads 12.6v on the volt meter. Headlights still shine bright.

franken · 07-12-2018, 10:04 PM

The solenoid is what's clicking, so it's trying at least. The solenoid switches (turns on/off) the starter and throws the starter drive (Bendix) out to engage the flywheel/flexplate. Those aren't happening. You can jump from the big + terminal to the S-terminal to see if that helps. If it does, the solenoid isn't able to draw enough current to operate.

Measure the voltage to ground (block) at the S-terminal when the key is in the start position. Clean both battery terminals, cable terminals at both ends, and make sure the big ground cable goes to the block.

TopFuel1966 · 07-12-2018, 10:47 PM

Quote:

Originally Posted by jchav62

Still reads 12.6v on the volt meter. Headlights still shine bright.

A shorted cell will make a battery do weird things. Ask me how I know.
If it were mine the next thing I would do would be to have the battery tested as a step in the process of elimination.
Any O'Reilly's, etc will do it free of charge.

jchav62 · 07-13-2018, 07:40 AM

I'll have the battery tested today after work. And I'll check all grounds and connections again.

Thanks

TopFuel1966 · 07-13-2018, 01:43 PM

Please be sure to let us know what it took to resolve this issue.

jchav62 · 07-13-2018, 02:47 PM

Quote:

Originally Posted by TopFuel1966

Please be sure to let us know what it took to resolve this issue.

Will do! I also did a post on the HAMB... bad battery is the consensus there too... I hope it's that and nothing more major.

Thanks!

jchav62 · 07-13-2018, 05:58 PM

Took the battery to two different stores and it tested good.

jchav62 · 07-13-2018, 07:02 PM

Got her fired up. Not sure exactly what did it. I unplugged the main fire wall plug and cleaned the contacts with cleaner.... cleaned the wire where it hooks up to the horn relay and checked all the grounds. Dropped the batt back in and she started right up. Thanks all for the advice! JC62

stsalvage · 07-14-2018, 08:34 PM

If nothing works then its the horn Rely.its the one thing that runs the truck.They do go bad it sits on the core support next to the voltage regulator.Here is what it looks like.The wire should never be connected to the battery factory they did But Put it in a junction box where all your power leads go to they fixed the problem in 1967 --1972 here look

Remember to ground your hood these is not enough ground with your hood springs

jchav62 · 07-16-2018, 09:10 AM

it's fixed.

07-12-2018, 09:21 PM	#1
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Electrical issue, 62 c10 So yesterday i went out to the garage and decided to fire up the truck. Reached in as i normally do, turned the key.... one click, then everything was completely dead... no lights, no radio, nothing. Unhooked the battery, to check for corrosion, all was good, reconnected it. Had power again. Tried starting it again... one click and all dead again. I replaced the positive cable.... no change. What would cause this? Bad solenoid? Wiring issues? Thanks JC62 __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4

07-12-2018, 09:29 PM	#2
TopFuel1966 Registered User Join Date: Jul 2009 Location: Menifee, CA Posts: 471	Re: Electrical issue, 62 c10 Possibly a shorted cell in the battery. It works under a light load but not a heavy one.

07-12-2018, 10:04 PM	#4
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,052	Re: Electrical issue, 62 c10 The solenoid is what's clicking, so it's trying at least. The solenoid switches (turns on/off) the starter and throws the starter drive (Bendix) out to engage the flywheel/flexplate. Those aren't happening. You can jump from the big + terminal to the S-terminal to see if that helps. If it does, the solenoid isn't able to draw enough current to operate. Measure the voltage to ground (block) at the S-terminal when the key is in the start position. Clean both battery terminals, cable terminals at both ends, and make sure the big ground cable goes to the block. Last edited by franken; 07-12-2018 at 10:12 PM.

07-13-2018, 07:40 AM	#6
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Re: Electrical issue, 62 c10 I'll have the battery tested today after work. And I'll check all grounds and connections again. Thanks __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4

07-13-2018, 01:43 PM	#7
TopFuel1966 Registered User Join Date: Jul 2009 Location: Menifee, CA Posts: 471	Re: Electrical issue, 62 c10 Please be sure to let us know what it took to resolve this issue.

07-13-2018, 05:58 PM	#9
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Re: Electrical issue, 62 c10 Took the battery to two different stores and it tested good. __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4

07-13-2018, 07:02 PM	#10
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Re: Electrical issue, 62 c10 Got her fired up. Not sure exactly what did it. I unplugged the main fire wall plug and cleaned the contacts with cleaner.... cleaned the wire where it hooks up to the horn relay and checked all the grounds. Dropped the batt back in and she started right up. Thanks all for the advice! JC62 __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4

07-14-2018, 08:34 PM	#11
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: Electrical issue, 62 c10 If nothing works then its the horn Rely.its the one thing that runs the truck.They do go bad it sits on the core support next to the voltage regulator.Here is what it looks like.The wire should never be connected to the battery factory they did But Put it in a junction box where all your power leads go to they fixed the problem in 1967 --1972 here look Remember to ground your hood these is not enough ground with your hood springs Attached Images

07-16-2018, 09:10 AM	#12
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Re: Electrical issue, 62 c10 it's fixed. __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4



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