Ok thanks for the clarification. First be aware that the scan tool you are using may not be able to properly "clear" the code, if the light goes off after you clear it and does not come back on but DOES come on when you start the truck back up then there is a valid issue here, the SRS system performs a self check several times including everytime you start the vehicle. B1801 D squib refers to an open in the driver horn button assembly, this can be due to a defective driver air bag, air bag center sensor issue, spiral cable issueor the wires from the steering column to the center air bag, this requires several complex checks to be performed and also requires special training in air bag safety procedures and handling. This is not something to be inspected or repaired by an at-home do it your self mechanic.

Yes I do, click below:

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Note that as i stated above this is not intended to be done by anyone that is not properly trained in air bag safety, I not just answer hold any legal liability to damage to your truck or personal injury if an air bag deploys.