how do i find why my fuel guage and speedometer arent working on my 90 dynasty
my fuel guage and my speedometer are not working on my 90 dynasty. are they related somehow? what do i need to check and how do i do it

Not the most dynamic-looking of Dodge vehicles, what this four-door, six-passenger, mid-size sedan lacked in beauty, it made up for in roominess and speed. The 1990 Dodge Dynasty was offered in base and LE trims, with a standard 2.5-liter, four-cylinder engine or a 3.0-liter, 141-hp V6, both standard with a 3-speed automatic. New for 1990 in the LE trim was an optional 3.3-liter, 147-hp V6, paired with a four-speed automatic. With either V6 engine, this front-wheel drive sedan had some giddyup power for a conservative family car.
Cheaper and with fewer options than its close relative, the New Yorker (they shared a platform), the 1990 Dynasty was an affordable family car that was easy on the gas budget. Other additions to the 1990 Dynasty included driver's airbags, and leather seats in the LE.
The roomy interior means a comfortable ride for both front and rear passengers, and a lot of drivers sing the praises of the large and deep trunk. Quick and responsive acceleration, decent gas mileage (22/27 mpg), and smooth performance were also highlighted. Negative reactions focused on the dowdy, plain look of the car and its poor handling of turns.
my fuel guage and my speedometer are not working on my 90 dynasty. are they related somehow? what do i need to check and how do i do it
My headlamps go on and off after being used a while, It does't matter if your on either hi or low beam, The marker lamps do not flicker. I have replaced the headlamp switch and it continues to happen. So can you tell me where is the headlamp relay located ? I did not see it in any fuse boxes. I don't know where else to look...Please Help
90 dodge dynasty, getting fuel to the throttle body but wont start. it will start using starting fluid. anyone have any ideas. how can i check the PCM
Airbags
Driver side front airbags
Audio System
AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Seats
Front seat type: bench · Upholstery: cloth
Tires and Rims
Wheel covers: wire
Airbags
Driver side front airbags
Audio System
Antenna Type: power · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Steering wheel: tilt-only
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Roof
Sunroof: power glass
Seats
Front seat type: split-bench · Upholstery: cloth
Tires and Rims
Wheel covers: wire