Mazda Repair Questions? Ask Mechanics for Answers ASAP
What year model?
This is going to be the horn relay, horn switch, or clock spring. Can you do electrical diag?
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The link below is the wire diagram.
The diag will cost no more than 100$. The repair can range from 30$ like a wire issue up to 400$ if its a faulty part at the steering column and wheel.
Normally its a wire shirt to ground on the switch side before the relay causing the relay to energize and close.
I can find no connection possible to the low oil light. I compared both circuits and see no relation.