If the speedometer and brake lights aren't working then you should change the fuse. If that doesn't work then check the electrical system associated with your Heritage.
Brake lights and turn signals are on a separate circuit from the tail lights. Tail lights are on the same circuit with the dashboard lights. If the dashboard lights aren't working either, check the fuse. If they ARE working, check the headlight switch.
my turn signals do not work in my 1992 Pontiac Firebird
one of the lights is not working
turn signal switch needs replaced!
in dash lights
if turn signals are working , and brake lights not working, i would replace the stop light switch on the brake pedal
Check the fuses and the bulbs.
Could be the brake light switch or fuse.
Replace the flasher relay if the lights come on but do not flash.
what makes my 2002 inside lights will work during the day but not night, my dashlight, speedometer ,radio lights
If the ABS light is flashing it means the system is malfunctioning but still working. The dash light behind the speedometer is burnt out.
If this is an electronic unit, the heat generated after the lights are on for one half hour, is affecting the intergrity of the electronic circuit board.