My backup sensors don't beep anymore can it be a fuse and where would I find it?

Could be just a fuse. Could be wiring, module, or the sensor. It has to be diagnosed.

check the fuse panel for the fuse for that function and remove it ,the fuse cover or owners handbook will show the correct fuse

It's not that simple anymore . The transmission range sensor switch is what they have now . This range sensor informes the PCM - engine computer what gear the vehicle is in. When you put the gear selector into reverse B+ voltage from the range sensor to the PCM tells the PCM reverse has been selected , the PCM then will energize the reverse lamp relay (located in the under hood fuse/relay box) there by turning on the reverse lamps . There are two fuse's in the under hood fuse/relay box . F27 10amp. & F35 10amp.

Have you checked the reverse switch on the transmission? Fuse in the fuse box?

http://www.ehow.com/how_6016968_fix-2006-dodge-grand-caravan.html
Hi try this link the 2003-2006 are almost the same and the above link should help you to find the fuse. After you replace the fuse if it still does not work call your local dealer to find out if it could be a reverse sensor or reverse switch. Good Luck and don't forget to let everyone on fix ya know if this worked.

could be a fuse, if not the wiring to the sensors. if both seem right, then the sensing unit has to be checked.

You can simply remove the negative battery cable for 1 min for the same effect.

I would take out the door switch, cut the wires and then twist them together, tape them. And the switch is now gone an not the causeible problem anymore.

You a faulty door ajar sensor in one of the doors or the tailgate. When this happens the system can be scanned to see which switch is defective, otherwise you must remove all the door panels and the rear glass run channel to access the switches which is on the latch

One of the four sensors have failed. Only solution is to replace the faulty one.