Engine cranks but does not start, no dash lights after causing arc under dash next to fuse box

Have 2018 Toy Tacoma, was installing a transceiver and inadvertently caused an arc under dash next to the interior fuse box, was grabbing power off the red 18 gauge wire behind fuse box blew 30amp fuse under hood box, checked all other fuses, checked and tested relays. Engine cranks but does not start, no dash lights. Hooked OBDII sensor and it will not communicate with vehicle. Reset control module, "no joy" Will check connector in the morning, but am stumped to what is wrong. Any suggestions?

 

I hate to say it, but maybe you fried your ECU?

 

Smells a lot like you just fried your ECU.

 

Welcome to the forum sorry this has to be your first post.

Sorry but you are probably dealer bound on this one, something expensive probably got frosted.

These trucks are incredibly sensitive to any electric work, folks have taken out important parts installing LED map lights. You always want to disconnect the negative battery terminal for any electric work.

Let us know how it turns out and good luck.

 

oh no Charlies, that sucks sorry, but as others have mentioned, you may have smoked more than a fuse.

 

Guess you were 'out-to-lunch' and didn't bother reading any of the electrical posts on TW.
Sorry about your woes. Not trying to rub it in.

 

Good luck man. Expensive battery disconnect lesson.

 

A ecu from Toyota Your Price: $547.69. Retail Price: $806.20. You Save: $258.51. Check the fit ... 2018-2020 Toyota Tacoma Ecm Dealer will charge you list, diagnostic ($150) and install fee. Alway disconnect battery when doing electrical work. Everywhere on this site says so. Good luck

didn’t mean not to check wires and fuses but if it’s the ecu what it would cost. I have read too many wish I had disconnected the battery.

 

get this transceiver thing out of there and all the wiring you did. have you added other electrical after market stuff prior or is this you first?
get it towed to the dealer. keep us advised.

 

Lol you really think he can do that himself? Everyone is good at something...
Personally, I suck at wiring. When I absolutely have to do it myself, I take 10X longer and incredible safety precautions. I not only disconnect the battery, I put the truck in a Faraday cage and pull the main breaker to the house.

 

This be that one you burnt?

 

Yes, that looks like the fuse.

 

OP, is your Taco a key or push button version start?

 

Key

 

Anyway to view this 18awg wire behind the cab fuse box?

 

Do you have a wiring diagram? That would be step one. Not replacing the ecu for christs sake

 

I bet that hurts.

 

Caribe is the resident expert on wiring issue. Ignore the others for now and follow his lead.

 

Yeah, I got real interested when Caribe replied. Following for the diagnosis...