What are the signs of a weak alternator in a used Suzuki Swift, and how do I diagnose it?

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What are the signs of a weak alternator in a used Suzuki Swift, and how do I diagnose it?

I’m planning to buy a used Suzuki Swift 2010–2018 model in Pakistan. What are the signs of a weak o r failing alternator I should look for before purchase? Are there any quick tests I can do myself?

Gari Specialist asked on 03 May 2025 11:44:37 am

1 Answer

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Gari Master - on 03 May 2025 11:47:55 am

When buying a used Swift in Pakistan, especially models from 2010 to 2018, check for these signs of a weak o r failing alternator:

Warning Signs:

Dim headlights o r dashboard lights

Battery warning light on the instrument cluster

Engine cranks slowly o r stalls

Squealing noise from engine bay could indicate belt o r alternator bearings

Burning rubber smell may indicate belt slippage

Quick DIY Tests:

Start the car and measure battery voltage with a multimeter. It should read 13.5V–14.5V when running.

Turn on all electrical accessories AC, lights, radio. If the voltage s significantly below 13V, the alternator is likely weak.

Check for noise o r play in the alternator pulley by hand when the engine is off.

If in doubt, ask the seller for maintenance history o r have a mechanic check it before finalizing the purchase.