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'72 K5 - BYT - 1 ton swap

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Turns out it was only a blown fuse:
Blown_fuse.jpg


Classic case of over-thinking it. Truck dies in the middle of the road, I did all of the electrical, it MUST be some problem with the wiring... :surepal:. It could never be the fuse I installed for just such an occasion.
If it would have been light out and not raining I'm sure I would have seen the blown fuse, but whatever, live and learn. Back to driving it. :burnout:
 
ashman said:
Turns out it was only a blown fuse:
Blown_fuse.jpg


Classic case of over-thinking it. Truck dies in the middle of the road, I did all of the electrical, it MUST be some problem with the wiring... :surepal:. It could never be the fuse I installed for just such an occasion.
If it would have been light out and not raining I'm sure I would have seen the blown fuse, but whatever, live and learn. Back to driving it. :burnout:
Click to expand...
Am I missing something, I don't see a fuse?
 
CK5 said:
Am I missing something, I don't see a fuse?
Click to expand...

Those appear to be a non-standard fuse type.... Not 20A, 30A...

Could be more of a 36D type fuse in this case.... :). It's worth checking more frequently to avoid issues in the future.


-G
 
Uuuhhhhh, I believe we have a new meaning to 'maxi-fuse' !!

Or do we just have a new visual reference for said fuse?
 
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Lol guys, figured just a pic of the fuse was pretty boring so a little background spice was in order.
Mark1968 said:
You should probably find out why that fuse blew.
Click to expand...
it's basically the replacement for my fusible link so it may be under sized.
Also, I had basically everything in the truck going full blast, plus hooked to an incorrectly wired trailer. I'll get the trailer hooked up right and keep an eye on it.
 
I'm guessing it's a 30A? I have a similar "whole sha-bang" fuse and I'm using a 70A. My electric fans would trip a 30A pretty quick.
 
My fans are on relays that have their own fuses, so they aren't Part of the 30 amp limit if I remember correctly. I'll have to double check in the morning.
 
Mark1968 said:
You should probably find out why that fuse blew.
Click to expand...

bp71k5 said:
I'm guessing it's a 30A? I have a similar "whole sha-bang" fuse and I'm using a 70A. My electric fans would trip a 30A pretty quick.
Click to expand...

Took another look at it this morning, and yup, the fans go through that fuse too. I was probably pushing the limits of that fuse and then the fans kicked on and killed it. I have 2 "main" fuses. 1 runs everything on the engine harness, the other runs basically everything else. The "everything else" fuse was the one that blew. At some point I should probably move the fans to their own fuse like I though I had done. :surepal: For now I just bumped the "everything else" fuse up to 60 amp.
 
They are on their own relays, but those relays are on the same fuse, which they should not be.
 
ashman said:
They are on their own relays, but those relays are on the same fuse, which they should not be.
Click to expand...

Just be careful that you understand the wire gauge in your harness before you start bumping up the fuse sizes...

...overloading a small wire with a large fuse, turns the wire into the fuse. No Bueno. :yikes:

You can Google to find good tables for AWG ratings for max current and lengths. It's a good sanity check.

Ain't nobody got time for an electrical fire in their 1st Gen.


-G
 
I may be being unclear. The way I have it wired, this fuse supplies power to the fuse block. Good fat wire, short distance. The fans have their own individual fuses also, but still, everything on the fuse block goes through this fuse first.

In the case of the other night, nothing overloaded, so no individual fuses blew, but the total draw was more than 30amps.

I could rewire the fuse block though so that the fans do not go through the same fuse as the rest. I'll keep an eye on it. (and a fire extinguisher handy :) )
 
ashman said:
I may be being unclear. The way I have it wired, this fuse supplies power to the fuse block. Good fat wire, short distance. The fans have their own individual fuses also, but still, everything on the fuse block goes through this fuse first.

In the case of the other night, nothing overloaded, so no individual fuses blew, but the total draw was more than 30amps.

I could rewire the fuse block though so that the fans do not go through the same fuse as the rest. I'll keep an eye on it. (and a fire extinguisher handy :) )
Click to expand...

Mine is wired the same way. They're just wanting to make sure the wire coming off that fuse is rated for more amps than the fuse.

I'm not really sure why my harness has the big fuse for everything like that. I guess if the giant wire that powers the fuseblock shorts out, it'll pop that fuse and save me.
 
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