Changed fuses for back up lights in 2004 jeep liberty. bulbs are not blown. is there a relay or a wire (where) that needs to be replaced?

For the flash lights to be fast is because one of the bulds is fused n needs to be changed. Wen all flash lights are flashing wen you press one side its basically tht there is a short circuit on your switch control unit

Try replacing the brake light switch on your motor . It should be near the brake pedal .

sure, do you have 12vdc to the lamp, in park?
if not work to the source , the relay that the operates that.
alldata.com has the schematic.

fact 1, license plate feed runs off left park.
fact 2, the park relay feed both left and right park fuses and lamps.
so, fuse 7 is left, and fuse 9 is right.
did you only just look at the fuse, and proclaim, good.
or use a voltmeter? or use ohms to test fuse 7, oops
fuses that look good, can be bad. 0 ohms good, infinity is bad.

use volts, is there 12vdc on both sides if fuse 7,>?
yes, then fuse is good, parks turned on.
no, the output side of fuse 7 is 0v. so fuse is blown
if input is dead, the relay is bad, but how can it , if right works, answer.
it cant be bad.
so what is the voltage all the way from the fuse to the lamps.
id bet, (fuse good an voltage good at fuse 2 sides) that the line is open. cut wire, corroded connector.

the BCM turns the relay on, this part works.
so.... its just a break in this simple copper path.

use a voltmeter, it will not lie to you, trust it./

usa car, not Renegade or export car. nor DRL lamps.

fuse, can look good but be bad.
use any ohm meter, to make sure they are good. 0 ohms good.
the car can have park-tail relay. yes, it does have a park relay
that feeds 2 fuses (#7&9) then all lamps left and right.
the BCM controls the relay. body brain.

check voltage at all 4 pins of park relay, and bingo know who is messing up,?
pins 86/87 hot 12v all the time( battery)
87a = ground 0v all times.
30 is relay output, 12v park on.
85 pin is relay coil control. 0v park, 12v not park.
if you have 0v on 85 , in park the BCM is working

there is start.
if a fuse is blown to the BCM, it will mess up

you may have ablown fuse or a bad ground

If you have tested fuses and bulbs with test light,and they check out,
the next step is to put you jeep in reverse with the key on,and use your test light to probe the wires before they enter the bulb sockets for power,if you have power replace sockets,if not check to make sure wires are still connected to back up light switch on trans,if you find no problem there,replace the switch

It takes about ten minutes to check all the fuses. Use a test light and probe the cavities on the ends of the fuses (don't even need to remove them) With the key and light switch turned on, all fuses should have power at both ends. Replace any that don't. Check all fuses under dash and in power distribution center under hood...also check any lighting relays in dist center. Likely you will find something if you do this, if not, check grounds and any lighting modules involved.

Must be a broken wire. You'll have to trace it back using a test light, and probing every foot or so, until you find power.

If one of your bulbs has blown you will get a faster relay click when you activate the indicators. It sounds as though the relay itself could be sticking / broken.

Of course it could just be a blown fuse, I would check that first before changing relays

If yor liberty is a 2002 to 2004 it is very likley that the wiring harness is pinched under either the drivers or passengers seat. you need to remove the seats (its only 4 bolts) and lift up the carpet and look at the harness that runs under the seats. I have seen this many times before.By the way i am a Jeep master technicain and have been for 15 years.