Installing adapter cable — VW
Installing adapter cable on VW: 16 steps. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform codes 9C1, 1C1, 1Y7
- Special tools named: VAS 1978/1
📋 Procedure
- Remove dash panel insert .
- Pull connector housing (1) off blue connector (T32a) (7).
- Strip about 105 mm (4 in) of insulation off wire to blue connector (T32a).
- Cut brown/black wire (6) at contact 16 about 65 mm (2.5 in) away from connector housing (7).
- Using wire stripperVAS 1978/3 from wiring harness repair setVAS 1978 B, strip approx. 5 mm (0.2 in) off the ends of the wires.
- Make crimped connections between wire ends (2), (6) and adapter cable (4).
- Use crimping pliers (base tool)VAS 1978/1-2 with head adapter, 0.35 mm² - 2.5 mm²VAS 1978/1-1 for compressing crimp connectors.
- Compress connectors using crimping pliers (base tool)VAS 1978/1-2.
- Place shrink element for hot air blowerVAS 1978/15A onto hot air blowerVAS 1978/14A and hear crimp connectors from the middle outwards, until it is sealed completely and adhesive emerges.
- Reassemble contact housing (7) and connector housing (1).
- Wrap adhesive tape (3) around wire from blue connector (1), until wiring harness (4) is completely enclosed.
- Secure wire on blue connector (1) using a cable tie (2).
- Reinstall dash panel insert.
- Switch on ignition.
- Operate rear lid remote release switch E188:
- Check crimped connections of adapter wiring harness and polarity of the diode.
Other VW procedures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
- Removing and installing sub-frame, anti-roll bar and wishbone (Base running gear)
- Removing and installing wheel bearing, suspension strut and drive shaft (Base running gear)
- Assembly overview: Rear axle Golf Estate
- Assembly overview - Hydraulic unit, brake servo/ brake master cylinder (right-hand drive)
- Removing and installing control and hydraulic units
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.