The reverse wire on the side of trans mite have came off or you may have afalty reverse switch on trans or a bad ground from bolbes.
the reverse switch in the transmission
if it is a jeep Cherokee it needs a neutral safety switch mounted on the passenger side of the transmission. if it is a jeep grand Cherokee it needs the backup switch located on the drvers side of the transmission
brake relay or sensor
Check the ground wire connection.
Just replaced the headlight bulbs in a 98 Grand Cherokee that had the same problem. It had the wrong bulbs in it. It had 9007's in it. Calls for 9004's.
It could be a fuse or yes a short.
It only allows starting in park and neutral and it turns on the reverse lights.
On my 1993, 1 is Brown/with a light green tracer, the other is black. If the bulbs are good & the sockets look O.K. The Back up lights then go to the transmission. Right side reverse switch or some say neutral safety switch.
If parking and dash lights work: Maybe bad bulbs (double filamented) Bad socket? Bad ground circuit?
I would check the wires just behind the light. I had the same problem and the wires were broken a little just wiggle them as the lights are on.
I would check the wires just behind the light. I had the same problem and the wires were broken a little just wiggle them as the lights are on.
Replace the bulbs