Ok this likely applies to all BMW convertible hardtops. But that said, alongside replacing the two salmon relays periodically, there is a poorly executed harness wire tie on the passenger side that should be addressed. Especially in situations where vibration or movement is present, wire ties should never directly clamp a set of wires. Cable ties have hard plastic edges that can chafe the wires during movement and eventually cause failures (and shorts!) With your top half open, you can easily inspect the wiring looms going up both sides of the articulating top arms, from the trunk. You'll see that several cable ties are run around a plastic boss which holds the wires in place without the cable ties directly cinching the wires.
BUT ... on the passenger side there is a cable tie right before where the loom bends. Already the bend is a likely long-term issue. But that cable tie is a recipe for disaster. The solution - cut that cable tie, and make a new cable tie which is covered with two passes of shrink tubing. Fit the tubing long enough to protect the loom, but short enough to allow the cable tie to cinch up. That cable tie does not need the grip of Thor on those wires, but just enough to keep them generally together. The shrink wrap will provide cushion and protect the wires. @doublespaces
Filippo
BUT ... on the passenger side there is a cable tie right before where the loom bends. Already the bend is a likely long-term issue. But that cable tie is a recipe for disaster. The solution - cut that cable tie, and make a new cable tie which is covered with two passes of shrink tubing. Fit the tubing long enough to protect the loom, but short enough to allow the cable tie to cinch up. That cable tie does not need the grip of Thor on those wires, but just enough to keep them generally together. The shrink wrap will provide cushion and protect the wires. @doublespaces
Filippo
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