Waterproofing a DIY e-bike: the connectors fail before anything else

@voltbike_val · Sep 26, 2026 · 379 views
Difficultyeasy
Cost$10

Dielectric grease in every connector, especially the hall sensor and display plugs. Self-amalgamating tape over the Anderson or XT60 battery plug. Drip loops: route every cable so it goes down before it goes into a connector or the controller. Seal the controller's cable entry with silicone. Never pressure-wash a hub motor; the axle seals are not that good. If the motor has been submerged, open the side cover, dry it, and regrease. A $5 tube of dielectric grease prevents 80% of the "it just stopped working in the rain" posts.

#waterproof#connectors#dielectric-grease#ebike

63 💬 7 comments

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@torque_tina 24d ago

I did the same repair last month and your step 3 is where I got stuck. Wish I had this then.

14
@voltbike_val OP 23d ago

Should be the same procedure, the part moved slightly but the steps match.

0
@benchtop_bea 23d ago

Tried this over the weekend and it worked first time. Thanks for writing it up properly.

14
@arc_annie 25d ago

Small addition: wear eye protection for the part where you pry it. Learned that one the hard way.

11
@rtr_watch 23d ago

Question: do you need to disconnect power for this or is it safe to leave it plugged in?

5
@voltbike_val OP 23d ago

Should be the same procedure, the part moved slightly but the steps match.

0
@rtr_watch 24d ago

Tried this over the weekend and it worked first time. Thanks for writing it up properly.

2

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