Skip the auto shop - Our mechanics make house calls

Q: Car starts, dashboard lights flicker, air conditioning shuts off

asked by on

All the dashboard lights come on when I start my truck. For example, the oil light, engine light, brake light, etc. and then they properly turn off when the car has started. The problem that I’m having comes when I'm driving (after the dashboard lights have gone off) and then the dashboard lights begin to randomly flicker on and off as if I’m turning the engine on and off. All the time they flicker, the engine is running. After this happens there is loss of power in the cabin and the air conditioning turns off. What is your diagnosis of my pickup and the fix?

A: Hello there, thank you for asking about you...

Hello there, thank you for asking about your 1993 Isuzu Pickup. It sounds like a bad ground in the instrument panel circuit. Looking at the wiring diagram, I see the AC heater control panel and instrument cluster share the same ground, which is designated G200. That is the first place I would start. Electrical diagnosis and repair can be tricky, so I suggest you have a professional look into this for you. A certified technician from YourMechanic can inspect your car’s electrical problems and make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: The "hold" light keeps popping up on its own and it causes the car not to get out of third gear.

Try holding down the "HOLD" button for about 5 seconds and this should correct the problem. If it does not, you may have a computer issue that will require diagnosing with a scanning tool. In this case I would recommend...

Q: Warning lights come on while backing down a hill, Infiniti G25

There is a short somewhere causing the lights to work intermittently. However, to provide more insight as to where the short might be, I would need to know exactly which lights are illuminating intermittently. I'm guessing that it is not...

Q: Repeated engine stalling, even when running and driving

An intermittent problem can be one the most difficult to correct, since the problem needs to be present to best diagnose it. But there are a few things that can lend to this problem. Some possibilities are the Mass Airflow...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...