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

asked by on September 14, 2016

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?

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Check engine light spontaneously comes on

Hi there, thanks for writing in about your 2003 Geo Tracker. There are numerous potential causes for the problem you are having. It could be anything from a bad spark plug to a failed sensor. The only way to know...

Brake lights work but no tail lights. Half of my dash cluster lights up no gauges... Please help

Hi there. It sounds like you have a series of electrical issues going on here. From my experience, with this vehicle, the combination switch needs to be tested first. Most of the time, the switch shorts out internally and this...

Car stutters in gear and stopped, the check engine light is on

Hello. I would need to know what you replaced to try and diagnose this issue. If you replaced the spark plug and the ignition coil then you may have an internal engine problem. Most of the time this is caused...

Related articles

What Typically Causes the Heating or AC to Stop Working?
While both the heating and AC are connected - to an extent - within your car, they’re actually...
How Do Secondary Defoggers Work?
Your Your car is equipped with two defoggers/defrosters. The primary one is in the front, and it’s tied into your air conditioner. Turn the controls to defrost, set your temperature, and then turn on the fan and you can watch...
P0014 OBD-II Trouble Code: Camshaft Position B - Timing Over-Advanced or System Performance (Bank 1)
P0014 code definition Camshaft Position “B” - Timing Over-Advanced or System Performance (Bank 1) What the P0014 code means P0014 is the...