Fast • Reliable • At Your Location
(210) 427-1672
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We test alternator output, battery condition, cables, grounds, and charging voltage.
Diagnosis for battery warning lights, low voltage warnings, dim lights, and electrical problems.
On-site testing to confirm if the alternator is weak, failed, or not charging properly.
Mobile alternator replacement service when testing confirms the alternator needs replacement.
Inspection of drive belt condition, wiring connections, fuses, grounds, and charging circuit concerns.
We come to your home, work, or roadside location in the San Antonio area.
Battery light on • Dead battery after driving • Dim headlights • Electrical problems • Car stalls while running • Slow crank • Burning smell • Whining noise • Low charging voltage
A dead battery does not always mean the alternator is bad. The issue may be the battery, belt, wiring, fuse, ground, or charging circuit. SHIELD Auto LLC tests the system first so you can make the right repair decision.
Supporting the greater San Antonio area with reliable mobile automotive care. We provide professional mobile mechanic services with over 15 years of experience. Whether at home, work, or roadside, we deliver honest pricing, fast turnaround, and dependable diagnostics.
Phone: 210-427-1672
Email: service@shieldautollc.com
Hours: 8 AM – 8 PM, Monday through Friday