DIAG
Automotive Electrical Diagnostics
Electrical fault-finding, wiring repair and practical diagnostics for modern and specialist vehicles.
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Independent • Workshop-based • Tillicoultry
Vehicle electronics, wiring & technical work.
Electrical diagnostics for older, classic and custom vehicles, modern vehicle upgrades, classic and hot rod wiring, and advanced 12V leisure systems from JRGM Technical Services LLP.
IMI accredited trainingAdvanced towbar & trailer servicing programmes
Vehicle electronicsCarPlay, cameras, trackers, dash cams & audio
Custom wiringClassic, hot rod and bespoke loom work
Leisure systemsVictron-favoured solar, charging & inverters
Workshop services
Technical work without the guesswork.
JRGMTS brings together vehicle electronics, specialist wiring and leisure electrical work from one workshop. Each service page explains what we do, where it is carried out and how to enquire.
AUDIO
Stereo & Double-DIN Upgrades
Head-unit upgrades including double-DIN installations with steering-wheel control retention where compatible.
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AUTO
Apple CarPlay & Android Auto
CarPlay and Android Auto upgrades through compatible replacement or integration systems.
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CAM
Reversing Cameras
Integrated and add-on reversing camera systems for cars, vans, campers and specialist vehicles.
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LOOM
Classic & Hot Rod Wiring
Electrical repairs, diagnosis and bespoke wiring for classic cars, hot rods and custom builds.
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Vehicle electronics
Vehicle electronics
Modern upgrades, properly integrated.
We commonly install double-DIN head units, Apple CarPlay and Android Auto systems, integrated or add-on reversing cameras, dash cams, and Vodafone or Scorpion trackers.
✓
Steering-wheel controls retained where compatible
Using suitable vehicle interfaces rather than abandoning existing controls.
Using suitable vehicle interfaces rather than abandoning existing controls.
✓
Integrated or standalone cameras
Factory-style integration where possible, add-on systems where it is not.
Factory-style integration where possible, add-on systems where it is not.
Classic & hot rod
Wiring for vehicles that need thinking, not guessing.
JRGMTS carries out diagnosis, repairs, electrical upgrades and bespoke loom work on classic cars, hot rods and specialist builds. Experience includes classic VW repairs, complete VW camper looms and custom wiring work alongside DTH Works and Hamilton Racing.
These projects are workshop-only and the vehicle must be left with us.
Classic & hot rod wiringLeisure electrical
12V systems built around how the vehicle is used.
Solar, DC-to-DC charging, inverters, batteries, monitoring and fault diagnosis for campervans, motorhomes and caravans. We generally favour Victron equipment where it suits the application.
One company, specialist brands
Towbars and trailers have dedicated identities.
JRGM Technical Services LLP operates TowBars2U® and Central Scotland Trailer Servicing Centre, keeping each specialist service easy to find while sharing the same workshop standards and team.
TowBars2U®
Mobile and workshop towbar fitting, towing electrics and nationwide e-commerce for towbars and wiring kits.
Direct: 01259 207399
Visit TowBars2UCentral Scotland Trailer Servicing Centre
Trailer servicing and repairs up to 3,500kg, including brakes, bearings, electrics, fabrication and PG9 work.
Direct: 01259 235993
Visit CSTSCWho you deal with
A small, hands-on team.
Gordon and James both handle fitting, servicing, quotations, accounts, admin and customer calls. The team has grown, but the partners remain directly involved in the work.
Gordon McDonald
Partner
Gordon founded TowBars2U in 2021 and later formed JRGM Technical Services LLP with James Rigby. He has long-standing interests in vehicles, electronics and technology, with training in electronics, computer domain administration and…
- IMI Accredited Professional Development — Towbar Technician Advanced Programme (issued 14 September 2023)nIMI Accredited Professional Development — Trailer Servicing and Maintenance (issued 30 August 2023)
James Rigby
Partner
James qualified as a draftsman before spending much of his career with Maplin Electronics, progressing through shop fitting, sales, assistant management, store management and area management. After Maplin closed he successfully ran…
- IMI Accredited Professional Development — Towbar Technician Advanced Programme (issued 14 September 2023)nIMI Accredited Professional Development — Trailer Servicing and Maintenance (issued 30 August 2023)
Ben
Towbar Fitter
Ben joined the team around September 2025 as an additional towbar fitter, supporting the continued growth of TowBars2U fitting work.
Finley McDonald
Part-Time Trailer Technician
Finley joined part-time in late 2025 and supports the workshop with trailer servicing and related maintenance work. In July 2026 he completed and passed the NTTA Course Foundation in Trailer Servicing.
- NTTA — Course Foundation in Trailer Servicing, 2-day course, NTTA accredited and endorsed by AL-KO & KARTT (7–8 July 2026)
Barnpark Hub
Specialists working together on complex builds.
JRGMTS works alongside Hamilton Racing for fabrication and hot rod engineering and DTH Works for restoration, metalwork and paint — all on the same Barnpark Drive estate.
UNIT 8
JRGM Technical Services LLP
Custom wiring, vehicle electronics, older/classic vehicle diagnostics and electrical integration.
UNIT 10
Hamilton Racing
TIG welding, custom headers, stainless exhausts and hot rod engineering.
UNIT 4
DTH Works
Classic vehicle restoration, metalwork and show-quality paint.