# Wiring and ECU Reprogramming in Anaheim, CA

Canonical: https://fleettruckrepairshop.com/services/electrical-hvac/wiring-ecu/
Business: Fleet Truck Repair Shop, Yorba Linda, CA. Serving Anaheim, California.
Phone: (714) 909-1844 | Email: info@ocrvcenter.com

Electrical faults strand commercial trucks, so we trace wiring and reflash control modules at our Yorba Linda shop for Anaheim and Orange County fleets. We repair harnesses, clear corrosion and chafed grounds, diagnose CAN bus faults, and reprogram or update ECUs so your truck sheds phantom codes and starts reliably every morning.


## What this includes
- Full wiring-harness diagnosis and repair for shorts, opens, and corrosion
- Ground-strap and connector cleaning to cure intermittent electrical faults
- CAN bus and multiplex network diagnosis for communication codes
- ECU, TCM, and body-module reprogramming and software updates
- Parasitic-draw testing for batteries that drain overnight
- Relay, fuse-block, and circuit repair with correct-gauge wire and proper sealing
- Upfit wiring correction for liftgates, refrigeration, and add-on accessories

## Who it is for
- Anaheim fleets chasing intermittent no-starts, phantom codes, or dead accessories
- Operators whose accessory or upfit install left behind electrical faults
- Fleets that need ECU updates or reflashes to settle drivability on Orange County routes

## Pricing
Simple circuit repairs sit near the low end; full harness and module work reaches the high end, with totals confirmed in writing after an in-shop assessment. Diagnostics billed at $285 per hour, electrical labor at $260 per hour.

## FAQ
### Can you find an intermittent electrical fault?
Yes. We work from wiring diagrams, parasitic-draw testing, and CAN bus tools to trace intermittent faults other Anaheim shops give up on, then repair the exact circuit at fault.

### Do you reprogram ECUs?
We reflash and update ECUs, TCMs, and body modules to manufacturer software so Orange County commercial trucks clear drivability faults and run the latest calibrations.

### My battery keeps dying overnight. Can you help?
That is usually a parasitic draw. We measure current with everything off and isolate the circuit pulling your Anaheim truck's battery down while it sits parked.