'66 Brake Fuse - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chance66C10 · 07-15-2016, 07:24 PM

Every time I press the brake pedal the fuse blows. The tail lights will work, but as soon as I press the pedal the fuse blows. Any ides on where I should start looking.

Thanks,
Chance

Ewr101 · 07-15-2016, 10:18 PM

Do you have a wiring schematic of the truck? That would help you a ton but if not, I would follow the wires from each brake light back looking for bare wire, bad splices ect ect.... If it's a single wire for each side and the tail lights work, then the problem is before they're combined into that single wire for each side. Also check to see if you're putting in the right size fuse. Simple things that I don't think of are what always gets me...

Chance66C10 · 07-15-2016, 10:32 PM

Everything was working on my truck until I tried and repair some damaged wires. It was raining on my way to work one day, so I was using the wipers. Apparently the previous owner did a poor job splicing a damaged wire and it started to burn some additional wires.

I re-spliced all of the wires behind the dash that had any kind of discoloring. I must have done something wrong as the brake lights are not working. I have rechecked all of the connections and they appear to be good. I'm going to buy the American Autowire harness next month, but I was hoping I could get her back on the road temporarily.

Regards,
Chance

Chance66C10 · 07-15-2016, 10:35 PM

I forgot to mention that I have a wiring schematic that I have been referencing, but I'm a rookie when it comes to electrical work.

I noticed that you also are in Spring. Do you ever make it out to NIfty Fifties?

Regards,
Chance

Ewr101 · 07-17-2016, 10:15 AM

I would think that one or more of those wires are spliced to the wrong spot then. They tend to discolor after so long.

I haven't heard of Nifty Fifties, what's that?

_Ogre · 07-17-2016, 12:31 PM

the brake switch power is 1 of 3 12v+ feed wires into the turn signal switch
study the 60-66 wiring schematics posted in the sticky section above this forum
the turn/stop/hazard can be confusing at first, once you figure out how the switch works it makes life easier

start by looking for a dead short after the brake light switch and report back your findings

07-15-2016, 07:24 PM	#1
Chance66C10 Registered User Join Date: Jul 2015 Location: Spring, TX Posts: 22	'66 Brake Fuse Every time I press the brake pedal the fuse blows. The tail lights will work, but as soon as I press the pedal the fuse blows. Any ides on where I should start looking. Thanks, Chance __________________ 1966 Chevy C10 SWB

07-15-2016, 10:18 PM	#2
Ewr101 Registered User Join Date: Dec 2014 Location: Spring, Tx Posts: 244	Re: '66 Brake Fuse Do you have a wiring schematic of the truck? That would help you a ton but if not, I would follow the wires from each brake light back looking for bare wire, bad splices ect ect.... If it's a single wire for each side and the tail lights work, then the problem is before they're combined into that single wire for each side. Also check to see if you're putting in the right size fuse. Simple things that I don't think of are what always gets me... __________________ 72 Chevy 2WD Blazer

07-15-2016, 10:32 PM	#3
Chance66C10 Registered User Join Date: Jul 2015 Location: Spring, TX Posts: 22	Re: '66 Brake Fuse Everything was working on my truck until I tried and repair some damaged wires. It was raining on my way to work one day, so I was using the wipers. Apparently the previous owner did a poor job splicing a damaged wire and it started to burn some additional wires. I re-spliced all of the wires behind the dash that had any kind of discoloring. I must have done something wrong as the brake lights are not working. I have rechecked all of the connections and they appear to be good. I'm going to buy the American Autowire harness next month, but I was hoping I could get her back on the road temporarily. Regards, Chance __________________ 1966 Chevy C10 SWB

07-15-2016, 10:35 PM	#4
Chance66C10 Registered User Join Date: Jul 2015 Location: Spring, TX Posts: 22	Re: '66 Brake Fuse I forgot to mention that I have a wiring schematic that I have been referencing, but I'm a rookie when it comes to electrical work. I noticed that you also are in Spring. Do you ever make it out to NIfty Fifties? Regards, Chance __________________ 1966 Chevy C10 SWB

07-17-2016, 10:15 AM	#5
Ewr101 Registered User Join Date: Dec 2014 Location: Spring, Tx Posts: 244	Re: '66 Brake Fuse I would think that one or more of those wires are spliced to the wrong spot then. They tend to discolor after so long. I haven't heard of Nifty Fifties, what's that? __________________ 72 Chevy 2WD Blazer

07-17-2016, 12:31 PM	#6
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,670	Re: '66 Brake Fuse the brake switch power is 1 of 3 12v+ feed wires into the turn signal switch study the 60-66 wiring schematics posted in the sticky section above this forum the turn/stop/hazard can be confusing at first, once you figure out how the switch works it makes life easier start by looking for a dead short after the brake light switch and report back your findings __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer



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