Parasitic battery draws
A battery that repeatedly goes dead may be caused by a module, circuit, accessory, or wiring fault that stays active.
Electrical testing · Metro Detroit
Automotive electrical faults
tested properly.
Electrical problems are rarely solved reliably by guessing. Truth Mobile Diagnostics tests power, ground, signal integrity, circuit load, current draw, and network communication at the vehicle.
When to call
Problems we
handle.
Truth Mobile Diagnostics focuses on evidence-based testing. We verify the complaint, test the affected system, and explain what the results support before recommending a repair.
Power and ground faults
Voltage-drop and load testing find weak connections that may still pass a simple continuity check.
CAN and LIN communication
Network testing for modules that are offline, intermittent, or disrupting communication between vehicle systems.
Wiring and connector damage
Open circuits, shorts, corrosion, terminal tension, rubbed-through wiring, and poor prior repairs.
What the service includes
Diagnosis—not
parts swapping.
Electrical diagnosis may involve access to buried connectors, modules, harness sections, or intermittent faults. The first hour establishes a testing direction; complex concerns may require additional authorized time.
- 01Verify battery condition and system voltage
- 02Review fault codes and module communication
- 03Read wiring information and identify the affected path
- 04Load-test power, grounds, and controlled circuits
- 05Confirm the failure before recommending wiring, module, or component repair
Local mobile service
Serving Troy
where the vehicle sits.
Appointments are available at homes, workplaces, dealerships, private sellers, and roadside locations when the setting is safe and suitable. Primary coverage includes Troy, Rochester Hills, Sterling Heights, Royal Oak, Madison Heights, Birmingham, Auburn Hills, Pontiac, and Warren.
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Common questions
Before you book.
Can you find what is draining my battery?+
Yes. Parasitic-draw testing measures key-off current and isolates the circuit or system responsible when the fault is present.
Do you program modules?+
Programming availability depends on the vehicle and module. Diagnosis is performed first so programming is not sold as a guess.
Why is continuity testing not always enough?+
A damaged circuit may show continuity but fail under load. Voltage-drop and load testing reveal resistance a basic ohmmeter can miss.
Can you repair wiring on-site?+
Many accessible wiring and connector repairs can be completed on-site. Harness replacement or major disassembly may require a shop.