Backup lights won t come when in revers - 1998 GMC Jimmy

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer ... rest is up to u.. U can also get free manuals

The neutral safety switch turns on the lights when the truck is in reverse. Look there too. May not be a fuse.

Has the battery been tested?

More than likely the problem is the backup switch located in the transmission range sensor.

Most likely would be the bulbs, the fuse, or the switch on transmission. Would check in that order.

You may have a faulty/shorted reverse light switch. The back-up lights come on when you put the shift lever in reverse. The shift lever linkage contacts this switch. Here is a youtube video explaining how to replace such a switch. How to fix REVERSE LIGHT SWITCH on 2005 Ford Focus and similar models...

check the gear linkages on the gearbox and none of the floor to see if something has jammed the mechanism.If not I would suggest that you get somebody to inspect the gearbox.Regards

revers switch on trans bad revers tail light bulbs bernt out broken wire

the fuse for the reverse lights is located on the underhood fuse block. Look for the fuselabel VEH Backup and it's 10amps. If the ignition is switched off, transm in Park, and the reverse lights still on, try removing this fuse. The reverse lights shoud be off, which means the wiring from the fuseblock going to the reverse lamps is not the fault. If the lights stayed on after removing the fuse, then you have two possible culprits. The underhood fuseblock may be shorted, or a BCM (Body Control Module) that is malfunctioning. This is assuming that the wirings going to these components are normally sound. This requires thorough testing procedures.. goodluck and have a nice day. : )

As far as your back up lights....check the neutral safety switch. This was a BIG problem on the 98-99 Cadillacs.

On the heated seats....you'll have to check for voltage at the harness where it connects to the seat(s) if you can do this.