Car Problem Guide · Sharjah, UAE
Car Won't Start or Battery Keeps Draining in Sharjah — Causes & Fix
Few things are more frustrating than a car that won't start. Whether your battery is flat every morning or the engine simply won't turn over, JAS Auto Workshop in Sharjah has the diagnostic tools to find the exact cause and fix it properly — not just jump-start you and send you on your way.
Common Causes
- Dead or failing battery — very common in Sharjah's extreme heat (2–3 year battery life)
- Faulty alternator not recharging the battery while driving
- Parasitic drain — a component staying active and draining the battery overnight
- Starter motor failure — engine won't crank at all
- Immobiliser or key fob fault preventing engine start
- Faulty ignition switch
- Corroded or loose battery terminals reducing current flow
- ECU or BCM fault preventing engine start
Warning Signs
- Engine cranks slowly or struggles to start
- Battery warning light on dashboard
- Electrical accessories (radio, lights, windows) are dim or unresponsive
- Clicking sound when turning the key (starter or battery fault)
- Complete silence when turning the key (battery completely flat)
- Battery flat after leaving the car overnight
- Jump-starts work but the battery drains again within days
What to Do Right Now
- 1. Check if the headlights and interior lights work — if not, battery is likely flat
- 2. Try jump-starting the car with jump leads or a jump pack
- 3. If the car starts with a jump but the battery drains again, suspect alternator or parasitic drain
- 4. Check battery terminals for corrosion (white/green residue) and clean if present
- 5. Bring the car to JAS Auto Workshop for a battery and charging system test
How We Diagnose & Fix It
- 01 Battery health test (cold crank amps and voltage under load)
- 02 Alternator output test under load
- 03 Parasitic drain test — measuring current draw with everything off
- 04 Identify the circuit causing the drain with fuse pull method
- 05 Replace battery, alternator, or starter as needed
- 06 Repair corroded terminals or damaged wiring
- 07 Verify fix with road test and battery voltage monitoring
Related Services
Frequently Asked Questions
- Why does my car battery keep dying in Sharjah?
- Heat is the primary enemy of car batteries in the UAE. Sharjah's temperatures reduce battery life to 2–3 years. A battery dying repeatedly can also indicate a faulty alternator not charging it, or a parasitic drain from an electrical component staying on.
- How much does a car battery cost in Sharjah?
- At JAS Auto Workshop, replacement car batteries cost AED 280–600 depending on size and specification. We test your existing battery first to confirm it needs replacing before recommending a new one.
- How do I know if it's the battery or alternator?
- If the battery is flat and the car starts fine after a jump but the battery dies again within a day, the alternator is likely not charging it. If the battery was old (3+ years) and the car starts fine after replacement, the battery was the cause. JAS tests both to give you a definitive answer.
- What is a parasitic battery drain?
- A parasitic drain is when a component in the car (a relay, module, light, or aftermarket accessory) stays powered when the car is off and slowly drains the battery. Identifying the culprit requires a current draw test — something JAS diagnoses regularly.
Get Your Car Fixed in Sharjah
WhatsApp or call JAS Auto Workshop for a free assessment. We'll diagnose the problem accurately and give you a written quotation before any work begins.