1999 Plymouth voyager. right signal light. have changed bulbs, fuse and thing behind brake pedal

You may have 2 problems.
First check the wire connector at the rear left underside of vehicle to see if you have voltage at brake wire. If you do, you may have a ground problem in the light assy.
Next identify the wire that goes into the N/S switch to see if voltage is going into and out of the switch. If you have power in and out then you may have a bad wire to the b/u lights or a ground problem at the light assy

1998 Plymouth breeze all Light are working except the right Break Light

Some vehicles use a double filament bulb, if one of the filaments is 'burnt' out then the turn signal would work but the running/brake light would not work.

The horn is protected by fuse #9 (20 Amp), but my diagrams don't show which fuse
controls the cruise control.
Your Voyager has 2 fuse panels - one under the driver's side instrument panel (just to the right
of the parking brake pedal), and one next to the battery, under a plastic cover..



Fig 1 - driver's side interior fuse panel - note proximity to parking brake pedal - 99 Plymouth Voyager



Fig. 2 - Engine Compartment fuse panel - note proximity to battery - 99 Plymouth Voyager

Maybe a relay or fuse is bad or the wiring to it.

But you said that the third brake light works.

So the brake switch must be ok.
Turn signals would be the flasher or wiring to it.
CIRCUIT PROTECTION Fuse Block Fig. 1: The fuse box is located under a cover at the lower left instrument panel — 1987 Voyager shown
The fuse block and relay bank is located on the driver's side under the lower instrument panel. The fuse block contains fuses for various circuits as well as circuit breakers, horn relay, ignition lamp thermal time delay, and the turn signal flasher. The hazard warning flasher is mounted into a bracket below the fuse block. The individual fuse and relay locations can be found in the wiring diagrams at the end of this section.
is bad.

The first thing to check is the brake switch(es) that are on the brake pedal lever, and the circuit for the third brake light is seperate from the normal brake lights.

If the brake light switch(es) and wiring do check out alright then the problem will most likely be in the turn-signal switch, and the brake lights are ran through the turn-signal switch.

Your earth is bonding properly. Make sure you have a good bond that is fixed either to your chassis, with all rust, sealent and other cotings are removed frois should dolve your problem.m the fixing. Th

1999 Plymouth grand voyager

Until you fix the problem, you should remove the fuse. The battery will run down !!

This problem is most likely caused by the BCM (Body Control Module). The BCM is located inside. It is behind the fuses and has lots of connections. After you remove the BCM note of the Part Number P/N. The replacement BCM must have the same part number. From all my research you can get a new one for from $800 to $1500 or get one from a salvage yard for $10 -$50.
Write down the odometer readings before you change this unit. The replacement unit may have a different mileage showing.
When you install the BCM make sure everything works. Try doors, windows, air, fan, remote, turn signals, hazard, lights, backup lights, horn, brakes, dash lights, etc, etc. This unit controls a number of functions and will have to "learn" your vehicle.
And yes, it's a good idea to disconnect the battery ground cable before replacing the unit.

CHECK ALL THE GROUND LEADS TO THE LIGHTS AND CHECK FOR CORROSION

the tail light lenses are most likley the problem. the sockets will also have to be replaced . try moving the backup light sockets to the brake light sockets . you should be able to get one working. this is for test purpos. at least you will know if it is the problem. good luck