Need to run some wires through the firewall. What's the best way to do it? I want the wires to end up at the fuse box under the glove compartment
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Need to run some wires through the firewall
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If you pull some of the carpet back up near where it meets the glovebox, there's a rubber grommet which can be pierced to accommodate wiring. This is how the OBD2 wire for a JB4 is typically routed.
It's a bugger to get to though, and you will ideally need to create a small slit in the grommet to pass the wiring through. A metal coathanger or similar stiff wire is useful to help draw/push the wire through the hole.
The wiring will pop out behind the battery. It can be fiddly to reach - two people (one wiggling from inside the cabin and one waiting with a torch from the engine bay side) makes the job easier.
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Even better... a walk-through with pics! This applies to the Passat too.
Running Cables Through The Firewall – Volkswagen MK7 Golf – AutoInstruct
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