Again with the electrical issue.

[PG01]

The mega fuse didn’t solve the problem. Taking the positive lead off of the battery does seem to alleviate the issue for a day or so.

So your positive cable runs from the battery to starter but also to the main fuse block under hood as stated above. If removing the positive on the battery clears your problem, something is shorting when connected....the main fuse panel on these trucks are known to rot from the inside out, as stated above, pulling it apart may damage some pins but i bet your problem resides within there, corrosion is mfer

 

[wjburken]

the main fuse panel on these trucks are known to rot from the inside out, as stated above, pulling it apart may damage some pins but i bet your problem resides within there, corrosion is mfer

Agree. Definitely worth looking at.

The corrosion does strange things. Had to replace the main fuse panel on my ‘07 Silverado due to corrosion issues. Had to pull the fuses for my headlights so they would turn off and the fuse on my horn because it would go off when the key was off.

The dealer didn’t believe me on the horn issue until his service tech put the horn fuse in and blasted everyone’s ears in the shop.

 

[norcalboon]

Worth a shot?

 

[OR VietVet]

Like I previously stated, it is always best to start with the basics first. I have never been a guy that just bolts parts on unless I haven't done all the previous steps first and the first step is always the basics. Intermittent problems are the worst there is and like this guy, he stuck to the basics and lo and behold, he fixed it. Great.

 

[Daniel12]

Like I previously stated, it is always best to start with the basics first. I have never been a guy that just bolts parts on unless I haven't done all the previous steps first and the first step is always the basics. Intermittent problems are the worst there is and like this guy, he stuck to the basics and lo and behold, he fixed it. Great.

Makes 100% sense,

Worth a shot?

Oh snap! He’s having exactly the same issues. I didn’t understand one thing though...he said he couldn’t reach the end of the lead that starts bolted to the back of the engine compartment and goes down, but then says he just replaced the whole lead and the opposing end is bolted to the alternator. Where did it go end originally and is it still there?

 

[OR VietVet]

The original attachment at the back of engine is still there and still attached at firewall. The new lead is attached at engine in a different place and at the firewall as well. Think of it as a "shunt". The original attachment at engine was way easier to get to and the oe lead was likely already attached at the back of block when engine was put in and all the assembly person had to do was attach at firewall.

 

[derfman00]

I am having this same problem. Vehicle would not start, but i could jump it. Battery tasted at 706 CA. After driving home, it wouldn't start again. When I released the mega fuse, I could hear the relays clicking like crazy. Locked it back down and the truck fired right up... There obviously has to be something loslo under there.

Thankfully I was able to buy it with a warranty that covers electronics.

 

[derfman00]

Update on my problem

Battery tested bad at the dealership after testing ok at Advance. Had them replace it ($60 premium over doing it myself, but i didn't have to run around or change a battery in South Texas heat)

So far everything is great. So I suggest even if a battery tests good at an auto parts store, you may want to find someone to run the more thorough test on it.

hopefully that's all it was

 

[derfman00]

Update on my problem

Battery tested bad at the dealership after testing ok at Advance. Had them replace it ($60 premium over doing it myself, but i didn't have to run around or change a battery in South Texas heat)

So far everything is great. So I suggest even if a battery tests good at an auto parts store, you may want to find someone to run the more thorough test on it.

hopefully that's all it was

So far, so good. No more weird electrical problems going in

 

[BG1988]

Update on my problem

Battery tested bad at the dealership after testing ok at Advance. Had them replace it ($60 premium over doing it myself, but i didn't have to run around or change a battery in South Texas heat)

So far everything is great. So I suggest even if a battery tests good at an auto parts store, you may want to find someone to run the more thorough test on it.

hopefully that's all it was

that is so they don't have to warranty it....