Mechanical
Electrical & Computer Diagnostics
Find the real problem the first time.
State-of-the-art electrical and diagnostic equipment for modern vehicles.
Overview
Modern vehicles run on networks — not just wires. A window that won't roll up might be a switch, a motor, or a body control module command. Jack's traces circuits with wiring diagrams and live data, not parts cannon.
We service engine, body, and chassis modules with professional scan tools. After component replacement, we perform required relearns and calibrations so warning lights stay off.
Intermittent faults get road-test replication when possible — the hardest electrical problems need patience, not guesswork.
How Jack's approaches this
- Multi-module scanning beyond generic code readers
- Voltage drop testing and parasitic draw diagnosis
- Wiring harness repair with proper splice and seal methods
- Post-repair module relearn and calibration procedures
What to expect
Typical timeline
Simple sensor: same day · Wiring faults: 1–3 days · Intermittent: varies
Investment range
Call for a written estimate
Parts standards
- OEM or OEM-equivalent sensors
- Proper gauge wire and sealed connectors
- Dielectric grease on critical connections
Vehicles we see
- All years with OBD-II and CAN networks
- Fleet vans with high accessory load
- Vehicles with aftermarket alarm issues
What's included
OBD-II & module scans
All accessible modules read for codes and freeze frame.
Circuit testing
Multimeter, scope, and load testing on suspect circuits.
Sensor replacement
O2, MAF, crank, cam, wheel-speed, and more.
Programming & relearn
Calibrations after battery, sensor, or module service.
When to visit
- Warning lights on dashboard
- Intermittent accessory failures
- Battery dead overnight
- Failed emissions test
- Random stall or no-start
- Multiple unrelated codes at once
Our process for this service
01
Code harvest
All modules scanned; history and pending codes recorded.
02
Circuit isolation
Test plans from wiring diagrams — not guess-and-replace.
03
Repair authorization
You approve sensor, wiring, or module work with clear scope.
04
Repair & program
Components installed; relearns and calibrations completed.
05
Verify monitors
Drive cycles run so emissions and systems stay ready.
Why Jack's
Electrical work rewards patience. Sam's techs get time to diagnose — not a 15-minute bay turnover quota.
— Sam, owner · Meet the team
Michigan drivers
Salt corrodes ground points and trailer harness connectors. We check chassis grounds on every no-start with good battery.
Frequently asked questions
Gallery
Related shop work
Real vehicles from Jack's bays — collision refinish, custom wheels, mechanical repair, and the Fort Street shop our neighbors know.
Mechanical
Engine repair & rebuild
Mechanical
Brake caliper service
Mechanical
Suspension inspection
Work you can stand behind
Jack's stands behind the repairs we perform. Mechanical and collision work is completed to documented standards, with written estimates before work begins and a clear explanation of what's covered when you pick up.
View warranty details →Related services
Need electrical & computer diagnostics?
Call us during business hours or request a free quote.