GsLex00

iTrader: (3)

Just installed a new battery and when I hook up both terminals the alarm goes off...any ideas of what is going on?? I've tried using the lock/unlock buttons on the key but nothing

Thanks, Tom

lexo98

iTrader: (2)

is it the factory alarm or aftermarket?

GsLex00

iTrader: (3)

it is the factory alarm

speedaddic

iTrader: (10)

can't be.... does the horn sound? or a siren? if its a siren its one of 2 things.

1. a self powered siren
2. battery backup for alarm.

I'm leaning towards 1 because that's what the self powered sirens do when the battery is disconnected.

GsLex00

iTrader: (3)

I just picked up the car a month ago..do they have sirens stock? but again the alarm goes off when i connect the battery

ThomasGS4

iTrader: (19)

No the car honks when you hit the panic button.

GsLex00

iTrader: (3)

thats what I thought..anyway i'll probably give Lexus a call tomorrow and see what they say

speedaddic

iTrader: (10)

is it the horn or a siren you hear? Please clarify

GsLex00

iTrader: (3)

its a horn

Richauto2

use your key on the dr. door key cylinder to try to kick it off. and check the siren tone, aftermarkert has multiple tones, factory is a single type.

sakataj

iTrader: (182)

would be easier OP if u made a video and posted it....could cut out the guessing on the sound

GsLex00

iTrader: (3)

i had an aftermarket alarm on my Evo...definitely a factory alarm

TYPEII

iTrader: (5)

I think you had the factory alarm "on" or something to that nature when the old battery was in the car... So when you installed the new battery, the system thinks it still "on", close the hood and all doors tight and just press the transmitter to unlock, it should go "off"...

GsLex00

iTrader: (3)

il give that a shot typeII, let u all know what happens..

JiBBeL

iTrader: (2)

Last time that happened to me... the battery terminals on the new battery were backwards. Hooked the positive to the negative... and so forth. Blew a couple fuses. Honked like crazy though! Know it sounds stupid... but