Won't start, lights work, locks don't

I had a dead battery. While trying to jump it, the horn kept going off. Then, after switching jumper cables, we got the battery to hold a charge. It's at 75% according to my charger. The lights all work, but the doors and windows don't. Trying to use the fob just turns on the hazards, and it doesn't even try to turn over. Any ideas? 05 4D TRD.

 

Just replace the battery and be done with it.

 

Agreed. When a battery is dead, it's dead.

 

Measure the battery voltage, before and while attempting to crank the engine--before it should be 12.6 to 12.8 V, while cranking it has to be 10.5V or better--if not the battery is shot...

 

Pull the battery, have it load tested.

Odds tell us you'll then install new battery.

 

It'd probably be worth it to check your fuses too.

 

Do you have a security system? Using your key, lock and unlock the door for about 5 cycles. Also check for blown fuses. If you battery holds a charge, it's fine.

 

So you hooked up the jumpers cables backwards at first? If so, check fuses.

 

That was my first thought, then I wondered if "after switching jumper cables" meant switching to another set?

If initially the connections were reversed there will likely be a lot more "blown" than just fuses...

 

If you reversed the jumper cables your main fuse is more than likely shot.

 

I won't lie, I've done it before but noticed right away. Blew radio and wiper fuses. If it was on for any period of time, I hope it didn't reach ecu before blowing a fuse. I would change battery but check every fuse under dash and hood first. Just my thoughts.

 

Pretty much what everyone else said. Check fuses and cross your fingers you didn't fry anything else. (if you reversed the polarity)

20(+) years ago when I was a kid my Dad had Costco replace the battery in his 1986.5 Nissan pickup. The "mechanic" was too busy BSing with us to realize he swapped the terminals. Ended up frying the ECU and most of the fuses. Expensive repair back in the day that Costco fronted the bill for.

 

Yeah sound like you fried the Ecu since you had to get new jumper cables. Sucks

 

Thats what fuses are for. In the instance of an over-voltage/reverse polarity a fuse will break the circuit to protect the electrical devices connected. While your hypothesis is not impossible, it's highly unlikely.

 

Wrong. Fuses are to protect the wiring in case of a circuit overload. The amount of time it takes a fuse to blow in a reverse polarity situation is an eternity when electronics are involved. There is a huge ongoing thread on here where AAA hooked the jump pack up backwards and fried the ECU.

 

Obviously you have never hooked up the jumper cables backwards on a Honda Civic. Fuse pops right away.

 

I will kindly disagree that the fuses are only there to protect the "wiring". I have no time or desire to debate electronics or circuitry.

 

As I write this I'm repairing a blower motor wiring harness on a Nissan Titan. Guess what it blew the fuse to protect the circuit.

 

Just because there have been instances where the ECU didn't fry, that doesn't mean you can always get away with it.

Banging a hooker bareback is probably safe most of the time, but it only takes once to catch something.

https://www.tacomaworld.com/threads/aaa-jump-start-fried-my-computer.488465/

 

Lighting does strike twice. I'm still wondering if the OP had the jumper cables reversed or he had a junk pair of jumper cables.