Fuseable links, backward battery charging and smoke! What did I break, blow or melt?

[Kernal]

Tossing this out FWIW:

It's probably a rare event but there was one instance where someone on this forum burned up his main Cowl harness behind the dash when a cheapo Made in Chy nuh fuse didn't pop when it should have.

The aftermarket fuses in the photo above (different font and plastic color) look like they're the Littelfuse brand which apparently has a good reputation.

The OEM fuses are the Pacific brand which is what you'll get if you buy them from Toyota.

 

[BILT4ME]

Finally had a chance to get to this yesterday.

Everything in Jon's list checked out fine, so carefully checked all the fuses in the panel under the dash: 7.5A IGN was blown. Replaced and now all is good. Cheers all.

My question is WHY did the 7.5A IGN fuse blow? What failed that brought that on? Bad Relay?

 

[CJF]

My question is WHY did the 7.5A IGN fuse blow? What failed that brought that on? Bad Relay?

Remember this was all due to me hooking up jumper cables backwards. My guess is when you do that, all bets are off on what might blow before the fusible links do their job. The fact that the only other thing to go was that one fuse is A-OK with me.

 

[BILT4ME]

Remember this was all due to me hooking up jumper cables backwards. My guess is when you do that, all bets are off on what might blow before the fusible links do their job. The fact that the only other thing to go was that one fuse is A-OK with me.

Oh yeah. That makes sense and it gave it's life to do it's job and protect your truck from burning to the ground.