Car Alarm & Radio Services

01/09/2026

First job of the day removing the component protection from this vw up. The original stereo was faulty so the garage fitted a replacement but no sound came out due to this protection.I programmed this out onsite and now the customer can listen to their stereo once more.

28/08/2026

🚨 FIAT 500 STEERING LOCK JAMMED ON? 🚨

We’ve just uploaded a new video showing an emergency procedure to release a jammed Fiat 500 steering lock. 🔒🚗

If you’ve got a Fiat 500 with the steering lock stuck on, this could help you understand how the vehicle can be manually released in an emergency.

⚠️ Please note: This is an emergency procedure only. If the steering lock fault continues, the underlying problem will still need to be correctly diagnosed and repaired.

🎥 Watch the full video here:
Watch the emergency steering lock procedure⁠

If you need help with a vehicle electrical or diagnostic fault, get in touch with C.A.R.S. – Car Alarm & Radio Services.

27/08/2026

🚗 BMW FRM MODULE REPAIR – DEVIZES, WILTSHIRE 🚗

Another successful mobile repair completed today, this time in Devizes, Wiltshire.

This BMW had an issue with the FRM (Footwell Module). The FRM controls a number of electrical functions around the vehicle, and when it develops a fault it can cause a range of electrical problems.

Instead of replacing the module and potentially facing additional coding and programming costs, we were able to repair the fault and get the vehicle back up and running.

At Car Alarm & Radio Services, we specialise in diagnosing and repairing vehicle electrical faults properly — not just replacing parts and hoping for the best! 🔧⚡

📍 Fully mobile service covering Wiltshire & Gloucestershire
🔴 BMW FRM repairs
🔴 Advanced vehicle diagnostics
🔴 Auto electrical fault finding
🔴 Module repairs and programming

Need help with a BMW electrical fault? Get in touch.

27/08/2026

🚗 Ford Fiesta No Crank Diagnosis — LS67 FMM

Today’s job was a 2017 Ford Fiesta 1.5 TDCi that had been suffering from battery issues and had been in and out of the garage.

The customer was unsure whether the problem was an alternator fault or another electrical issue. By the time I attended, the battery was flat, the steering was locked and the vehicle would not crank.

🔧 Diagnostics carried out:

* Released the electronic steering lock using diagnostic equipment
* Found and rectified a loose battery earth connection
* Checked engine bay fuse F6 — OK
* Checked the main power supplies and earth connections at the starter motor — OK
* Vehicle still had a complete no-crank condition
* Tested the starter motor control circuit directly
* Applied power to the starter solenoid through the circuit until the starter began operating
* Fault traced to a sticking starter motor solenoid
* Started the vehicle and tested the charging system — 14.5 volts, charging correctly
* Carried out a parasitic current draw test
* Initial draw was around 2.4 amps, but after the vehicle shut down correctly there was no abnormal standing current draw

✅ Conclusion

The charging system is operating correctly and there was no confirmed parasitic battery drain once the vehicle entered sleep mode.

The starter motor/solenoid is sticking, causing the no-crank fault.

📌 Recommendation: Starter motor replacement

Another example of why proper diagnostics are important — what initially looked like a possible battery or alternator issue turned out to be a completely different fault.

C.A.R.S. — Car Alarm & Radio Services
Mobile Auto Electrical Specialists

26/08/2026

Toyota Aygo MOT fault rectification completed today! 🔧🚗

This Toyota Aygo had several electrical faults which needed sorting before its MOT:

❌ No main beam
❌ Radiator cooling fan not operating
❌ No dashboard illumination with full beam selected

We carried out a full diagnostic scan and testing procedure before locating the fault in the relay box under the bonnet, near the headlight. The relays were badly corroded and replaced.

✅ Main beam now working
✅ Radiator fan operating correctly
✅ Dashboard illumination restored
✅ All faults cleared
✅ Vehicle now MOT ready!

Another good example of why proper diagnostics and testing are important before simply replacing parts.

Need electrical faults diagnosed for an MOT failure? Get in touch with C.A.R.S. – Car Alarm & Radio Services.

25/08/2026

Ford Transit Custom BCM Cloning & Replacement

Another Ford Transit Custom in for specialist auto electrical work.

The Body Control Module (BCM) was removed from the vehicle, cloned and then refitted, helping to retain the vehicle’s original configuration and get everything working correctly again.

At C.A.R.S. – Car Alarm & Radio Services, we offer specialist electronic module services including:

🔧 BCM removal and refitting
💻 Module cloning
⚡ Fault diagnosis and testing
🚐 Ford Transit Custom electrical repairs
📍 Fully mobile service covering Wiltshire & Gloucestershire

If you’re experiencing electrical faults and suspect a control module issue, don’t just start replacing parts — proper diagnosis comes first.

📞 07970 252155

24/08/2026

🚐 Another mobile auto electrical job completed in Stonehouse today!

This Ford Transit had a couple of issues causing frustration for the customer:

❌ Parking sensor fault
❌ Bluetooth would no longer connect

After carrying out a full diagnostic scan, the parking sensor fault was traced to the left rear inner parking sensor. The faulty sensor was replaced with a customer-supplied unit and the fault was then cleared successfully. ✅

The Bluetooth issue was also sorted by clearing the stored phonebook memory and pairing the customer’s phone again. 📱

Another vehicle diagnosed and repaired without unnecessary parts swapping! 🔧

📍 Stonehouse, Gloucestershire
🚐 Fully mobile auto electrical service

If your vehicle has an electrical fault, warning light, parking sensor issue or diagnostic problem, get in touch with Car Alarm & Radio Services.

23/08/2026

Caralarmandradio.Com for all your auto electrical needs

Car electrics, advanced vehicle diagnostics, wiring fault diagnosis, ECU repairs, dash cam installation and mobile auto electrician covering Wiltshire and Gloucestershire.

22/08/2026

🔧 Another ECU repair completed — this time in Tetbury!

Today we were working on an ECU fault, carrying out specialist testing and repair work to get the vehicle back on the road.

Modern vehicles rely heavily on electronic control units, and when a fault develops it isn’t always a simple case of replacing parts. Correct diagnosis and testing are essential before condemning an ECU.

At Car Alarm & Radio Services, we offer specialist vehicle electrical diagnostics and ECU repair services across Tetbury, Cirencester, Swindon, Wiltshire and Gloucestershire.

✔️ Advanced diagnostics
✔️ ECU testing and repair
✔️ ECU cloning
✔️ Immobiliser-related ECU work
✔️ Mobile auto electrical services

If your vehicle has an electrical fault that other garages are struggling to diagnose, get in touch.

📞 Car Alarm & Radio Services
🚐 Mobile Auto Electrical Specialists

21/08/2026

Last job of the day

🚐 VW Caddy – ABS Coding & Brake Fault Diagnosis

This VW Caddy came to us after having a clutch and master cylinder replaced, but the brakes were still not fully releasing.

The ABS pump had also had its coding wiped, so we carried out a full diagnostic investigation.

🔧 What we found:

* ABS coding had been wiped
* Reprogrammed the ABS pump using VW ODIS
* Restored the original coding
* Carried out the required ABS basic settings
* Successfully calibrated the inlet valves
* Completed the ESP system function test
* The cut-out valve calibration repeatedly aborted due to a malfunction
* Final ABS fault remained: U10C5 – No or Incorrect Basic Setting / valve calibration data missing

This is a good example of why reading and clearing fault codes isn’t the same as diagnosing a fault.

The ABS can be correctly coded and communicating, but if a basic setting won’t complete, we need to establish why rather than simply throwing parts at the vehicle.

🛠️ Proper diagnostics. Proper testing. No parts changing for the sake of it.

📍 Mobile Auto Electrical Specialists covering Wiltshire & Gloucestershire

📞 07970 252155
🌐 caralarmandradio.com