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ahc low light

My AHC light flashes off and does not want to pump up to normal or high. What could be wrong? All fuses ok
That's a very big and general question with very little information.
Questions to ask yourself:
Are the 3 height sensors working mechanically?
Are the 3 height sensors working electrically?
What are the AHC pressures, front and rear?
Are there any fault codes reported?
Is the pump running at all?

According to frequency of AHC faults, the most likely culprit is a malfunctioning height sensor:
- either bent/broken/lose link arm,
- or the sensor innards (worn out sensor carbon trace, or corrosion),
- or a broken cable or lose plug.

PS:
All fuses? How many would that be? Probably more than you think. Depends on month of manufacture and model/market.
And, related: Is there anything else that doesn't work? Like a) Dome light / door switches, b) brake light, c) alternator/charging, e.g.
 
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