Aftermarket installation of head unit in 97 jeep grand cherokee

A bad connection at the speaker or the unit could be a problem. Burned out amp section as well.
This may help.

Make sure the speakers are matched to the system

If it's the factory system and the horn is sounding, cycle the door lock with the key to turn off the alarm. Sometimes the switch in the door lock is broken due to age, try the passenger or rear hatch lock if the driver's door won't reset it.

Some 1999 Cherokees were also equipped with an immobilizer, which uses a transponder chip in the key that is read by an antennae around the ignition lock.

The two systems are separate from each other, so more information may be needed.

no verb? any 2 cars stated.
Problem with 1985 Honda Prelude 97 jeep grand cherokee head gasket
97 jeep grand cherokee head gasket

I have the 1995 version and have had the same problem. For some reason, I would be driving down the road and then all of a sudden the sound would cut off. No indications on the radio. For the longest time I drove around without music, then one day I turn the volume up and it worked fine, the unit was resetting itself to the lowest volume setting for some reason.

I pulled the unit, cleaned and tightened all connectors; opened the radio up and resoldered the connection on the power board; and cleaned the connection to the antenna. I don't know which item fixed the problem because I did them all at the same time, but it worked, and so far the problem hasn't returned.

2.5" infinity 4 ohm tweeters

THE DOOR SPEAKERS ARE MADE TO SOUND LOW FREQUENCY THROUGH THE AMP,(60HZ-500HZ). THIS IS NORMAL. THE REST OF THE SOUND WAVES (500HZ -8000HZ) COME FROM YOUR 2 TOP SPEAKERS ON DASH NEAR WINDSHIELD, 2" TWEETERS.

Yes, the Infinity Gold series audio systems have a separate amplifier. In my '97 the amplifier is located under the drivers side rear seat.
Note that the amplifier is set to have speaker level inputs as opposed to regular level inputs. Both the amplifier and the speakers are NOT easily mixed and matched with after market components.

no, you have to ck each wire where it goes.

I have the file on my other computer - search other bulletin boards. Check with Crutchfield help desk.

Input wires are the speaker wires from the Amp head/receiver (so you can go to a BestBuy and ask them for the speaker wire colors). Black is ground. Yellow/black is main power. Blue/white is turn on wire. If in doubt take off the door panels and look at what color wires go to the speakers.