When i went to jump it, the horn blows and the lights flash. So i took the battery to AutoZone and it was a bad battery. I bring the battery home and install it, it does the same thing. It must be a problem with the security system. I dont know how to reset it or what to do. I bought the van recently used and theres not owners manual or anything. Its a good van and only has 90000 miles. Some one please help me out here.
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Re: battery died in 2001 astro van....
Some models of the astro were equipped with the security feature like your describing. If the radio is locked (meaning it doesn't work at all) it will be the security. Seems funny that the radio wouldn't work, but usually it locks it too. As far as I know, youll have to go to GM and have it unlocked.
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The power for the data link connector is from a 25amp fuse Number 7 in the IP fuse box. As long as the check engine light is on the computer has power. The main computer power is from two ECM fuses in the box near the battery. The fuse locations should be in the back of your owners manual.
CHECK for bad grounding of horn itself, rust and oxidation may not allow it to ground, also try "jumping" a wire from battery to horn, if it blows horn itself is good, contacts inside steering wheel button may be bent flat, or wire bad..
Take your battery in for testing after charging it. Then, to avoid pulling the Alternator for nothing, drive to a local Autozone, Advance, or Oeilys and ask them to check your charging system on the Van.
Consider taking an extra battery if you have one to fit, so you can get back home after the test. Run the van with the charger connected until you get good heat, then reduce the blower fan speed to minimum. Then disconnect charger.
If you are still stuck on the road, jumpstart the van until it is warm, using the jump car to charge the battery so you can go home and try again. Just leave the battery jumpers connected to the struggling van battery a few minutes so the old battery has a chance to charge.
really need more information. does your air bag light stay on, if so your clockspring below the steering wheel could be bad. disconnected the wires at your horn and with a test light see if the light comes on at the wire while someone presses the horn. if it does the horns are bad. there should be a horn relay under the hood for the horn. it could be bad. i hope this helps.
Do not replace the lock!
replace the ignition switch
the switch activates the starter then springs back keeping the engine running but, disconnecting the starter
repair the horn short circuit after this