How to Route Wiring Through Firewall When Installing Brake Controller on 2014 Ford Escape

Updated 08/12/2014 | Published 08/10/2014

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Snap Bushing Grommet - 9/16" ID, 11/16" OD

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Question:

etbc7 and primusiq...for 2014 ford escape. any suggestions on how to get from engine compartment thru firewall to driver cab ?? I cannot find any openings and there is no room under hood.??????

asked by: Geoff B

Expert Reply:

Your best bet is always going to be using an existing opening. If you can find an existing grommet where a factory wiring harness passes through the firewall into the passenger cabin, you can use a sharp knife to carefully poke a slit in the rubber or plastic grommet to pass the wire through.

If you cannot find anything, you'll need to drill your own hole, being extremely careful to make sure that there's not anything on the other side of where you're drilling that would be damaged.

You can drill an 11/16 hole, and use a snap bushing grommet like # SWC8057. The grommet will protect the wires from the edges of the hole. Once your wiring is complete, use some silicone sealant like # LT37464 to seal around the wiring to prevent water or fumes from entering the passenger cabin.

expert reply by: Mike L